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1111112112 = 2431117123787
BaseRepresentation
bin100001000111010…
…0011100110110000
32212102202100021110
41002032203212300
54233421041422
6302130553320
736351203625
oct10216434660
92772670243
101111112112
11520214a80
12270138840
131492717b6
14a77d234c
156782d60c
hex423a39b0

1111112112 has 80 divisors (see below), whose sum is σ = 3315537792. Its totient is φ = 316892160.

The previous prime is 1111112099. The next prime is 1111112117. The reversal of 1111112112 is 2112111111.

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 an insolite number, because it is divisible by the sum (16) and by the product (16) of the squares of its digits.

It is not an unprimeable number, because it can be changed into a prime (1111112117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52918 + ... + 70869.

Almost surely, 21111112112 is an apocalyptic number.

1111112112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111112112 is an abundant number, since it is smaller than the sum of its proper divisors (2204425680).

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

1111112112 is a wasteful number, since it uses less digits than its factorization.

1111112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123826 (or 123820 counting only the distinct ones).

The product of its digits is 4, while the sum is 12.

The square root of 1111112112 is about 33333.3483466633. The cubic root of 1111112112 is about 1035.7444796506.

Adding to 1111112112 its reverse (2112111111), we get a palindrome (3223223223).

It can be divided in two parts, 111111 and 2112, that multiplied together give a palindrome (234666432).

The spelling of 1111112112 in words is "one billion, one hundred eleven million, one hundred twelve thousand, one hundred twelve".