102112812 has 60 divisors (see below), whose sum is σ = 282660840. Its totient is φ = 32033664.

The previous prime is 102112771. The next prime is 102112823. The reversal of 102112812 is 218211201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3762 + ... + 14777.

It is an arithmetic number, because the mean of its divisors is an integer number (4711014).

Almost surely, 2^102112812 is an apocalyptic number.

102112812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102112812 is an abundant number, since it is smaller than the sum of its proper divisors (180548028).

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

102112812 is a wasteful number, since it uses less digits than its factorization.

102112812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18572 (or 18561 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 102112812 is about 10105.0884211866. The cubic root of 102112812 is about 467.4050625563.

The spelling of 102112812 in words is "one hundred two million, one hundred twelve thousand, eight hundred twelve".