31321322120021 has 8 divisors (see below), whose sum is σ = 31793493379200. Its totient is φ = 30851043331680.

The previous prime is 31321322119993. The next prime is 31321322120069. The reversal of 31321322120021 is 12002122312313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31321322120021 - 2¹⁸ = 31321321857877 is a prime.

It is a super-2 number, since 2×31321322120021² (a number of 28 digits) contains 22 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 (31321322120521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473084360 + ... + 473150561.

It is an arithmetic number, because the mean of its divisors is an integer number (3974186672400).

Almost surely, 2^{31321322120021} is an apocalyptic number.

It is an amenable number.

31321322120021 is a deficient number, since it is larger than the sum of its proper divisors (472171259179).

31321322120021 is an equidigital number, since it uses as much as digits as its factorization.

31321322120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946235419.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31321322120021 its reverse (12002122312313), we get a palindrome (43323444432334).

The spelling of 31321322120021 in words is "thirty-one trillion, three hundred twenty-one billion, three hundred twenty-two million, one hundred twenty thousand, twenty-one".