102112111212 has 48 divisors (see below), whose sum is σ = 242608988160. Its totient is φ = 33420498048.

The previous prime is 102112111109. The next prime is 102112111271. The reversal of 102112111212 is 212111211201.

It is a happy number.

It is a super-2 number, since 2×102112111212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102112111191 and 102112111200.

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, 66012 + ... + 456707.

It is an arithmetic number, because the mean of its divisors is an integer number (5054353920).

Almost surely, 2^102112111212 is an apocalyptic number.

102112111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102112111212 is an abundant number, since it is smaller than the sum of its proper divisors (140496876948).

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

102112111212 is a wasteful number, since it uses less digits than its factorization.

102112111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523022 (or 523020 counting only the distinct ones).

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

Adding to 102112111212 its reverse (212111211201), we get a palindrome (314223322413).

The spelling of 102112111212 in words is "one hundred two billion, one hundred twelve million, one hundred eleven thousand, two hundred twelve".