202126425021 has 6 divisors (see below), whose sum is σ = 291960391710. Its totient is φ = 134750950008.

The previous prime is 202126425013. The next prime is 202126425023. The reversal of 202126425021 is 120524621202.

202126425021 is a `hidden beast` number, since 2 + 0 + 2 + 12 + 642 + 5 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 192830765625 + 9295659396 = 439125^2 + 96414^2 .

It is not a de Polignac number, because 202126425021 - 2³ = 202126425013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202126425023) 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, 11229245826 + ... + 11229245843.

It is an arithmetic number, because the mean of its divisors is an integer number (48660065285).

Almost surely, 2^202126425021 is an apocalyptic number.

It is an amenable number.

202126425021 is a deficient number, since it is larger than the sum of its proper divisors (89833966689).

202126425021 is a wasteful number, since it uses less digits than its factorization.

202126425021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22458491675 (or 22458491672 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 202126425021 in words is "two hundred two billion, one hundred twenty-six million, four hundred twenty-five thousand, twenty-one".