131221202122131 has 12 divisors (see below), whose sum is σ = 192313166747016. Its totient is φ = 79528001285920.

The previous prime is 131221202122123. The next prime is 131221202122141.

131221202122131 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 131221202122131 - 2³ = 131221202122123 is a prime.

It is a super-2 number, since 2×131221202122131² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131221202122141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180745457106 + ... + 180745457831.

It is an arithmetic number, because the mean of its divisors is an integer number (16026097228918).

Almost surely, 2^{131221202122131} is an apocalyptic number.

131221202122131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131221202122131 is a deficient number, since it is larger than the sum of its proper divisors (61091964624885).

131221202122131 is a wasteful number, since it uses less digits than its factorization.

131221202122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361490914962 (or 361490914951 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

It can be divided in two parts, 13122120 and 2122131, that added together give a palindrome (15244251).

The spelling of 131221202122131 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, one hundred thirty-one".