102111111012 has 24 divisors (see below), whose sum is σ = 238407383200. Its totient is φ = 34015876416.

The previous prime is 102111110993. The next prime is 102111111071. The reversal of 102111111012 is 210111111201.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2624962 + ... + 2663577.

Almost surely, 2^102111111012 is an apocalyptic number.

102111111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102111111012 is an abundant number, since it is smaller than the sum of its proper divisors (136296272188).

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

102111111012 is a wasteful number, since it uses less digits than its factorization.

102111111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290155 (or 5290153 counting only the distinct ones).

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

Adding to 102111111012 its reverse (210111111201), we get a palindrome (312222222213).

The spelling of 102111111012 in words is "one hundred two billion, one hundred eleven million, one hundred eleven thousand, twelve".