131121200325523 has 32 divisors (see below), whose sum is σ = 137344757760000. Its totient is φ = 125028935609760.

The previous prime is 131121200325503. The next prime is 131121200325541. The reversal of 131121200325523 is 325523002121131.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131121200325523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131121200325503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8920409028 + ... + 8920423726.

It is an arithmetic number, because the mean of its divisors is an integer number (4292023680000).

Almost surely, 2^{131121200325523} is an apocalyptic number.

131121200325523 is a deficient number, since it is larger than the sum of its proper divisors (6223557434477).

131121200325523 is a wasteful number, since it uses less digits than its factorization.

131121200325523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22015.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 131121200325523 its reverse (325523002121131), we get a palindrome (456644202446654).

The spelling of 131121200325523 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, two hundred million, three hundred twenty-five thousand, five hundred twenty-three".