102130443204021 has 6 divisors (see below), whose sum is σ = 147521751294710. Its totient is φ = 68086962136008.

The previous prime is 102130443204011. The next prime is 102130443204043. The reversal of 102130443204021 is 120402344031201.

102130443204021 is a `hidden beast` number, since 1 + 0 + 2 + 13 + 0 + 443 + 204 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 97941405006225 + 4189038197796 = 9896535^2 + 2046714^2 .

It is not a de Polignac number, because 102130443204021 - 2¹¹ = 102130443201973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102130443204001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5673913511326 + ... + 5673913511343.

Almost surely, 2^{102130443204021} is an apocalyptic number.

It is an amenable number.

102130443204021 is a deficient number, since it is larger than the sum of its proper divisors (45391308090689).

102130443204021 is a wasteful number, since it uses less digits than its factorization.

102130443204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11347827022675 (or 11347827022672 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 102130443204021 its reverse (120402344031201), we get a palindrome (222532787235222).

The spelling of 102130443204021 in words is "one hundred two trillion, one hundred thirty billion, four hundred forty-three million, two hundred four thousand, twenty-one".