313331321021 has 32 divisors (see below), whose sum is σ = 338221440000. Its totient is φ = 289388039040.

The previous prime is 313331320969. The next prime is 313331321041. The reversal of 313331321021 is 120123133313.

It is a cyclic number.

It is not a de Polignac number, because 313331321021 - 2³⁴ = 296151451837 is a prime.

It is a super-3 number, since 3×313331321021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313331321041) 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, 74053976 + ... + 74058206.

It is an arithmetic number, because the mean of its divisors is an integer number (10569420000).

Almost surely, 2^313331321021 is an apocalyptic number.

It is an amenable number.

313331321021 is a deficient number, since it is larger than the sum of its proper divisors (24890118979).

313331321021 is a wasteful number, since it uses less digits than its factorization.

313331321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4929.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 313331321021 its reverse (120123133313), we get a palindrome (433454454334).

The spelling of 313331321021 in words is "three hundred thirteen billion, three hundred thirty-one million, three hundred twenty-one thousand, twenty-one".