321131425121 has 4 divisors (see below), whose sum is σ = 345833842452. Its totient is φ = 296429007792.

The previous prime is 321131425081. The next prime is 321131425141. The reversal of 321131425121 is 121524131123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121524131123 = 144829 ⋅839087.

It can be written as a sum of positive squares in 2 ways, for example, as 185902394896 + 135229030225 = 431164^2 + 367735^2 .

It is a cyclic number.

It is not a de Polignac number, because 321131425121 - 2²⁶ = 321064316257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321131425141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12351208646 + ... + 12351208671.

It is an arithmetic number, because the mean of its divisors is an integer number (86458460613).

Almost surely, 2^321131425121 is an apocalyptic number.

It is an amenable number.

321131425121 is a deficient number, since it is larger than the sum of its proper divisors (24702417331).

321131425121 is a wasteful number, since it uses less digits than its factorization.

321131425121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24702417330.

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

Adding to 321131425121 its reverse (121524131123), we get a palindrome (442655556244).

The spelling of 321131425121 in words is "three hundred twenty-one billion, one hundred thirty-one million, four hundred twenty-five thousand, one hundred twenty-one".