1111211112 has 64 divisors (see below), whose sum is σ = 3037455360. Its totient is φ = 335966400.

The previous prime is 1111211111. The next prime is 1111211113. The reversal of 1111211112 is 2111121111.

It is an interprime number because it is at equal distance from previous prime (1111211111) and next prime (1111211113).

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 not an unprimeable number, because it can be changed into a prime (1111211111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117687 + ... + 126777.

It is an arithmetic number, because the mean of its divisors is an integer number (47460240).

Almost surely, 2^1111211112 is an apocalyptic number.

1111211112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111211112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518727680).

1111211112 is an abundant number, since it is smaller than the sum of its proper divisors (1926244248).

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

1111211112 is a wasteful number, since it uses less digits than its factorization.

1111211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9574 (or 9570 counting only the distinct ones).

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

The square root of 1111211112 is about 33334.8333129176. The cubic root of 1111211112 is about 1035.7752403204.

Adding to 1111211112 its reverse (2111121111), we get a palindrome (3222332223).

Subtracting 1111211112 from its reverse (2111121111), we obtain a palindrome (999909999).

It can be divided in two parts, 111121111 and 2, that multiplied together give a palindrome (222242222).

The spelling of 1111211112 in words is "one billion, one hundred eleven million, two hundred eleven thousand, one hundred twelve".