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11111111112 = 233462962963
BaseRepresentation
bin10100101100100011…
…00001100111001000
31001200100111221000210
422112101201213020
5140223421023422
65034313401120
7542225612643
oct122621414710
931610457023
1011111111112
114791a29262
1221a11091a0
131080c5b67a
14775954a5a
154506db10c
hex2964619c8

11111111112 has 16 divisors (see below), whose sum is σ = 27777777840. Its totient is φ = 3703703696.

The previous prime is 11111111059. The next prime is 11111111113. The reversal of 11111111112 is 21111111111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11111111113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231481458 + ... + 231481505.

It is an arithmetic number, because the mean of its divisors is an integer number (1736111115).

Almost surely, 211111111112 is an apocalyptic number.

11111111112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11111111112 is an abundant number, since it is smaller than the sum of its proper divisors (16666666728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111111112 is a wasteful number, since it uses less digits than its factorization.

11111111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462962972 (or 462962968 counting only the distinct ones).

The product of its digits is 2, while the sum is 12.

Adding to 11111111112 its reverse (21111111111), we get a palindrome (32222222223).

Subtracting 11111111112 from its reverse (21111111111), we obtain a palindrome (9999999999).

It can be divided in two parts, 1111111111 and 2, that multiplied together give a palindrome (2222222222).

The spelling of 11111111112 in words is "eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred twelve".

Divisors: 1 2 3 4 6 8 12 24 462962963 925925926 1388888889 1851851852 2777777778 3703703704 5555555556 11111111112