321513325121 has 4 divisors (see below), whose sum is σ = 321514844592. Its totient is φ = 321511805652.

The previous prime is 321513325103. The next prime is 321513325123. The reversal of 321513325121 is 121523315123.

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 321513325121 - 2⁶ = 321513325057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321513325123) 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, 378611 + ... + 886776.

It is an arithmetic number, because the mean of its divisors is an integer number (80378711148).

Almost surely, 2^321513325121 is an apocalyptic number.

It is an amenable number.

321513325121 is a deficient number, since it is larger than the sum of its proper divisors (1519471).

321513325121 is a wasteful number, since it uses less digits than its factorization.

321513325121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519470.

The product of its digits is 5400, while the sum is 29.

The spelling of 321513325121 in words is "three hundred twenty-one billion, five hundred thirteen million, three hundred twenty-five thousand, one hundred twenty-one".