202131312131 has 16 divisors (see below), whose sum is σ = 235741982400. Its totient is φ = 173240464320.

The previous prime is 202131312121. The next prime is 202131312139. The reversal of 202131312131 is 131213131202.

It is a happy number.

It is not a de Polignac number, because 202131312131 - 2⁶ = 202131312067 is a prime.

It is a super-2 number, since 2×202131312131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202131312139) 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, 6116705 + ... + 6149661.

It is an arithmetic number, because the mean of its divisors is an integer number (14733873900).

Almost surely, 2^202131312131 is an apocalyptic number.

202131312131 is a deficient number, since it is larger than the sum of its proper divisors (33610670269).

202131312131 is an equidigital number, since it uses as much as digits as its factorization.

202131312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50859 (or 50845 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 202131312131 its reverse (131213131202), we get a palindrome (333344443333).

The spelling of 202131312131 in words is "two hundred two billion, one hundred thirty-one million, three hundred twelve thousand, one hundred thirty-one".