121351525131 has 16 divisors (see below), whose sum is σ = 164230934400. Its totient is φ = 79686771648.

The previous prime is 121351525123. The next prime is 121351525151. The reversal of 121351525131 is 131525153121.

It is not a de Polignac number, because 121351525131 - 2³ = 121351525123 is a prime.

It is a super-2 number, since 2×121351525131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121351525151) 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, 3667660 + ... + 3700598.

It is an arithmetic number, because the mean of its divisors is an integer number (10264433400).

Almost surely, 2^121351525131 is an apocalyptic number.

121351525131 is a deficient number, since it is larger than the sum of its proper divisors (42879409269).

121351525131 is a wasteful number, since it uses less digits than its factorization.

121351525131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51338.

The product of its digits is 4500, while the sum is 30.

Adding to 121351525131 its reverse (131525153121), we get a palindrome (252876678252).

The spelling of 121351525131 in words is "one hundred twenty-one billion, three hundred fifty-one million, five hundred twenty-five thousand, one hundred thirty-one".