131145221321 has 16 divisors (see below), whose sum is σ = 135388947648. Its totient is φ = 126972014400.

The previous prime is 131145221309. The next prime is 131145221323. The reversal of 131145221321 is 123122541131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131145221321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131145221323) 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, 5599766 + ... + 5623136.

It is an arithmetic number, because the mean of its divisors is an integer number (8461809228).

Almost surely, 2^131145221321 is an apocalyptic number.

It is an amenable number.

131145221321 is a deficient number, since it is larger than the sum of its proper divisors (4243726327).

131145221321 is a wasteful number, since it uses less digits than its factorization.

131145221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24872.

The product of its digits is 1440, while the sum is 26.

Adding to 131145221321 its reverse (123122541131), we get a palindrome (254267762452).

The spelling of 131145221321 in words is "one hundred thirty-one billion, one hundred forty-five million, two hundred twenty-one thousand, three hundred twenty-one".