313323121321021 has 32 divisors (see below), whose sum is σ = 386304562844928. Its totient is φ = 247993453992960.

The previous prime is 313323121321019. The next prime is 313323121321087. The reversal of 313323121321021 is 120123121323313.

It is not a de Polignac number, because 313323121321021 - 2¹ = 313323121321019 is a prime.

It is a super-2 number, since 2×313323121321021² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313323121321121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1154619271 + ... + 1154890603.

It is an arithmetic number, because the mean of its divisors is an integer number (12072017588904).

Almost surely, 2^{313323121321021} is an apocalyptic number.

It is an amenable number.

313323121321021 is a deficient number, since it is larger than the sum of its proper divisors (72981441523907).

313323121321021 is a wasteful number, since it uses less digits than its factorization.

313323121321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454501.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 313323121321021 its reverse (120123121323313), we get a palindrome (433446242644334).

The spelling of 313323121321021 in words is "three hundred thirteen trillion, three hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, twenty-one".