131331103021321 has 4 divisors (see below), whose sum is σ = 150092689167232. Its totient is φ = 112569516875412.

The previous prime is 131331103021253. The next prime is 131331103021343. The reversal of 131331103021321 is 123120301133131.

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 131331103021321 - 2⁹ = 131331103020809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131331103021381) 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, 9380793072945 + ... + 9380793072958.

It is an arithmetic number, because the mean of its divisors is an integer number (37523172291808).

Almost surely, 2^{131331103021321} is an apocalyptic number.

It is an amenable number.

131331103021321 is a deficient number, since it is larger than the sum of its proper divisors (18761586145911).

131331103021321 is an equidigital number, since it uses as much as digits as its factorization.

131331103021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18761586145910.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 131331103021321 its reverse (123120301133131), we get a palindrome (254451404154452).

The spelling of 131331103021321 in words is "one hundred thirty-one trillion, three hundred thirty-one billion, one hundred three million, twenty-one thousand, three hundred twenty-one".