202421131931 has 2 divisors, whose sum is σ = 202421131932. Its totient is φ = 202421131930.

The previous prime is 202421131909. The next prime is 202421132033. The reversal of 202421131931 is 139131124202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202421131931 - 2³⁴ = 185241262747 is a prime.

It is a super-2 number, since 2×202421131931² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 202421131894 and 202421131903.

It is not a weakly prime, because it can be changed into another prime (202421131331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101210565965 + 101210565966.

It is an arithmetic number, because the mean of its divisors is an integer number (101210565966).

Almost surely, 2^202421131931 is an apocalyptic number.

202421131931 is a deficient number, since it is larger than the sum of its proper divisors (1).

202421131931 is an equidigital number, since it uses as much as digits as its factorization.

202421131931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 202421131931 in words is "two hundred two billion, four hundred twenty-one million, one hundred thirty-one thousand, nine hundred thirty-one".