111111012111012 has 48 divisors (see below), whose sum is σ = 270535482212352. Its totient is φ = 35426133499680.

The previous prime is 111111012110981. The next prime is 111111012111023. The reversal of 111111012111012 is 210111210111111.

It is a happy number.

It is a super-2 number, since 2×111111012111012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111111012110982 and 111111012111000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14261853 + ... + 20630619.

It is an arithmetic number, because the mean of its divisors is an integer number (5636155879424).

Almost surely, 2^{111111012111012} is an apocalyptic number.

111111012111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111111012111012 is an abundant number, since it is smaller than the sum of its proper divisors (159424470101340).

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

111111012111012 is a wasteful number, since it uses less digits than its factorization.

111111012111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432008 (or 6432006 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111111012111012 its reverse (210111210111111), we get a palindrome (321222222222123).

The spelling of 111111012111012 in words is "one hundred eleven trillion, one hundred eleven billion, twelve million, one hundred eleven thousand, twelve".