102120012100 has 36 divisors (see below), whose sum is σ = 222650711248. Its totient is φ = 40654404000.

The previous prime is 102120012097. The next prime is 102120012131. The reversal of 102120012100 is 1210021201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2398806 + ... + 2441005.

Almost surely, 2^102120012100 is an apocalyptic number.

102120012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102120012100 is an abundant number, since it is smaller than the sum of its proper divisors (120530699148).

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

102120012100 is a wasteful number, since it uses less digits than its factorization.

102120012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840036 (or 4840029 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102120012100 its reverse (1210021201), we get a palindrome (103330033301).

The spelling of 102120012100 in words is "one hundred two billion, one hundred twenty million, twelve thousand, one hundred".