102112112090 has 16 divisors (see below), whose sum is σ = 183813834600. Its totient is φ = 40842170880.

The previous prime is 102112112033. The next prime is 102112112153. The reversal of 102112112090 is 90211211201.

It can be written as a sum of positive squares in 4 ways, for example, as 96331399129 + 5780712961 = 310373^2 + 76031^2 .

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, 170015 + ... + 482834.

Almost surely, 2^102112112090 is an apocalyptic number.

102112112090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102112112090 is a deficient number, since it is larger than the sum of its proper divisors (81701722510).

102112112090 is a wasteful number, since it uses less digits than its factorization.

102112112090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668497.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 102112112090 its reverse (90211211201), we get a palindrome (192323323291).

The spelling of 102112112090 in words is "one hundred two billion, one hundred twelve million, one hundred twelve thousand, ninety".