31320143320021 has 8 divisors (see below), whose sum is σ = 32083392038720. Its totient is φ = 30558479751072.

The previous prime is 31320143320003. The next prime is 31320143320031. The reversal of 31320143320021 is 12002334102313.

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 31320143320021 - 2²⁷ = 31320009102293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320143320031) 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, 396247440 + ... + 396326473.

It is an arithmetic number, because the mean of its divisors is an integer number (4010424004840).

Almost surely, 2^{31320143320021} is an apocalyptic number.

It is an amenable number.

31320143320021 is a deficient number, since it is larger than the sum of its proper divisors (763248718699).

31320143320021 is an equidigital number, since it uses as much as digits as its factorization.

31320143320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792574875.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31320143320021 its reverse (12002334102313), we get a palindrome (43322477422334).

The spelling of 31320143320021 in words is "thirty-one trillion, three hundred twenty billion, one hundred forty-three million, three hundred twenty thousand, twenty-one".