202131321220131 has 4 divisors (see below), whose sum is σ = 269508428293512. Its totient is φ = 134754214146752.

The previous prime is 202131321220123. The next prime is 202131321220141. The reversal of 202131321220131 is 131022123131202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202131321220131 - 2³ = 202131321220123 is a prime.

It is a super-2 number, since 2×202131321220131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202131321220141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33688553536686 + ... + 33688553536691.

It is an arithmetic number, because the mean of its divisors is an integer number (67377107073378).

Almost surely, 2^{202131321220131} is an apocalyptic number.

202131321220131 is a deficient number, since it is larger than the sum of its proper divisors (67377107073381).

202131321220131 is an equidigital number, since it uses as much as digits as its factorization.

202131321220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67377107073380.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 202131321220131 its reverse (131022123131202), we get a palindrome (333153444351333).

The spelling of 202131321220131 in words is "two hundred two trillion, one hundred thirty-one billion, three hundred twenty-one million, two hundred twenty thousand, one hundred thirty-one".