131221327253 has 4 divisors (see below), whose sum is σ = 131517538368. Its totient is φ = 130925116140.

The previous prime is 131221327229. The next prime is 131221327273. The reversal of 131221327253 is 352723122131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131221327253 - 2²⁰ = 131220278677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221327213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148104893 + ... + 148105778.

It is an arithmetic number, because the mean of its divisors is an integer number (32879384592).

Almost surely, 2^131221327253 is an apocalyptic number.

It is an amenable number.

131221327253 is a deficient number, since it is larger than the sum of its proper divisors (296211115).

131221327253 is an equidigital number, since it uses as much as digits as its factorization.

131221327253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296211114.

The product of its digits is 15120, while the sum is 32.

Adding to 131221327253 its reverse (352723122131), we get a palindrome (483944449384).

The spelling of 131221327253 in words is "one hundred thirty-one billion, two hundred twenty-one million, three hundred twenty-seven thousand, two hundred fifty-three".