121202131131 has 24 divisors (see below), whose sum is σ = 178409088000. Its totient is φ = 79265910192.

The previous prime is 121202131121. The next prime is 121202131133. The reversal of 121202131131 is 131131202121.

121202131131 is a `hidden beast` number, since 121 + 202 + 1 + 311 + 31 = 666.

It is not a de Polignac number, because 121202131131 - 2¹⁵ = 121202098363 is a prime.

It is a super-2 number, since 2×121202131131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121202131133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16090 + ... + 492608.

It is an arithmetic number, because the mean of its divisors is an integer number (7433712000).

Almost surely, 2^121202131131 is an apocalyptic number.

121202131131 is a deficient number, since it is larger than the sum of its proper divisors (57206956869).

121202131131 is a wasteful number, since it uses less digits than its factorization.

121202131131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477063 (or 477060 counting only the distinct ones).

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

Adding to 121202131131 its reverse (131131202121), we get a palindrome (252333333252).

The spelling of 121202131131 in words is "one hundred twenty-one billion, two hundred two million, one hundred thirty-one thousand, one hundred thirty-one".