102120010021 has 16 divisors (see below), whose sum is σ = 108956347776. Its totient is φ = 95376334336.

The previous prime is 102120009961. The next prime is 102120010033. The reversal of 102120010021 is 120010021201.

It is not a de Polignac number, because 102120010021 - 2²⁹ = 101583139109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120010121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8068320 + ... + 8080966.

It is an arithmetic number, because the mean of its divisors is an integer number (6809771736).

Almost surely, 2^102120010021 is an apocalyptic number.

It is an amenable number.

102120010021 is a deficient number, since it is larger than the sum of its proper divisors (6836337755).

102120010021 is a wasteful number, since it uses less digits than its factorization.

102120010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16268.

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

Adding to 102120010021 its reverse (120010021201), we get a palindrome (222130031222).

The spelling of 102120010021 in words is "one hundred two billion, one hundred twenty million, ten thousand, twenty-one".