313221003021 has 6 divisors (see below), whose sum is σ = 452430337710. Its totient is φ = 208814002008.

The previous prime is 313221002957. The next prime is 313221003071. The reversal of 313221003021 is 120300122313.

313221003021 is a `hidden beast` number, since 31 + 322 + 10 + 0 + 302 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159332697225 + 153888305796 = 399165^2 + 392286^2 .

It is not a de Polignac number, because 313221003021 - 2⁶ = 313221002957 is a prime.

It is a super-2 number, since 2×313221003021² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313221002985 and 313221003003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313221003071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17401166826 + ... + 17401166843.

It is an arithmetic number, because the mean of its divisors is an integer number (75405056285).

Almost surely, 2^313221003021 is an apocalyptic number.

It is an amenable number.

313221003021 is a deficient number, since it is larger than the sum of its proper divisors (139209334689).

313221003021 is a wasteful number, since it uses less digits than its factorization.

313221003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34802333675 (or 34802333672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 313221003021 its reverse (120300122313), we get a palindrome (433521125334).

The spelling of 313221003021 in words is "three hundred thirteen billion, two hundred twenty-one million, three thousand, twenty-one".