131321012321 has 8 divisors (see below), whose sum is σ = 133154676480. Its totient is φ = 129488287392.

The previous prime is 131321012309. The next prime is 131321012323. The reversal of 131321012321 is 123210123131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131321012321 - 2¹⁸ = 131320750177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131321012293 and 131321012302.

It is not an unprimeable number, because it can be changed into a prime (131321012323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49160 + ... + 514838.

It is an arithmetic number, because the mean of its divisors is an integer number (16644334560).

Almost surely, 2^131321012321 is an apocalyptic number.

It is an amenable number.

131321012321 is a deficient number, since it is larger than the sum of its proper divisors (1833664159).

131321012321 is an equidigital number, since it uses as much as digits as its factorization.

131321012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469615.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 131321012321 its reverse (123210123131), we get a palindrome (254531135452).

The spelling of 131321012321 in words is "one hundred thirty-one billion, three hundred twenty-one million, twelve thousand, three hundred twenty-one".