121113202131 has 16 divisors (see below), whose sum is σ = 187228139520. Its totient is φ = 77231606760.

The previous prime is 121113202123. The next prime is 121113202141. The reversal of 121113202131 is 131202311121.

121113202131 is a `hidden beast` number, since 1 + 211 + 1 + 320 + 2 + 131 = 666.

It is not a de Polignac number, because 121113202131 - 2³ = 121113202123 is a prime.

It is a super-2 number, since 2×121113202131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121113202141) 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, 97514035 + ... + 97515276.

It is an arithmetic number, because the mean of its divisors is an integer number (11701758720).

Almost surely, 2^121113202131 is an apocalyptic number.

121113202131 is a deficient number, since it is larger than the sum of its proper divisors (66114937389).

121113202131 is a wasteful number, since it uses less digits than its factorization.

121113202131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195029343 (or 195029337 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121113202131 its reverse (131202311121), we get a palindrome (252315513252).

The spelling of 121113202131 in words is "one hundred twenty-one billion, one hundred thirteen million, two hundred two thousand, one hundred thirty-one".