111211011012 has 24 divisors (see below), whose sum is σ = 263365381216. Its totient is φ = 36517048128.

The previous prime is 111211010993. The next prime is 111211011029. The reversal of 111211011012 is 210110112111.

It is a super-2 number, since 2×111211011012² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69160273 + ... + 69161880.

Almost surely, 2^111211011012 is an apocalyptic number.

111211011012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111211011012 is an abundant number, since it is smaller than the sum of its proper divisors (152154370204).

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

111211011012 is a wasteful number, since it uses less digits than its factorization.

111211011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138322227 (or 138322225 counting only the distinct ones).

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

Adding to 111211011012 its reverse (210110112111), we get a palindrome (321321123123).

The spelling of 111211011012 in words is "one hundred eleven billion, two hundred eleven million, eleven thousand, twelve".