313231210030021 has 16 divisors (see below), whose sum is σ = 316009739439360. Its totient is φ = 310462688188800.

The previous prime is 313231210029961. The next prime is 313231210030027. The reversal of 313231210030021 is 120030012132313.

It is a cyclic number.

It is not a de Polignac number, because 313231210030021 - 2⁹ = 313231210029509 is a prime.

It is a super-2 number, since 2×313231210030021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313231210029974 and 313231210030001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313231210030027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125429451 + ... + 127902343.

It is an arithmetic number, because the mean of its divisors is an integer number (19750608714960).

Almost surely, 2^{313231210030021} is an apocalyptic number.

It is an amenable number.

313231210030021 is a deficient number, since it is larger than the sum of its proper divisors (2778529409339).

313231210030021 is a wasteful number, since it uses less digits than its factorization.

313231210030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474916.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 313231210030021 its reverse (120030012132313), we get a palindrome (433261222162334).

The spelling of 313231210030021 in words is "three hundred thirteen trillion, two hundred thirty-one billion, two hundred ten million, thirty thousand, twenty-one".