102111212112 has 120 divisors (see below), whose sum is σ = 330458911776. Its totient is φ = 26930421504.

The previous prime is 102111212111. The next prime is 102111212123. The reversal of 102111212112 is 211212111201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102111212091 and 102111212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111212111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1639218 + ... + 1700369.

Almost surely, 2^102111212112 is an apocalyptic number.

102111212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102111212112 is an abundant number, since it is smaller than the sum of its proper divisors (228347699664).

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

102111212112 is a wasteful number, since it uses less digits than its factorization.

102111212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339625 (or 3339612 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102111212112 its reverse (211212111201), we get a palindrome (313323323313).

The spelling of 102111212112 in words is "one hundred two billion, one hundred eleven million, two hundred twelve thousand, one hundred twelve".