31320311210321 has 16 divisors (see below), whose sum is σ = 35977251536640. Its totient is φ = 26709194957760.

The previous prime is 31320311210269. The next prime is 31320311210333. The reversal of 31320311210321 is 12301211302313.

It is not a de Polignac number, because 31320311210321 - 2²² = 31320307016017 is a prime.

It is a super-2 number, since 2×31320311210321² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320311210341) 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, 4955210 + ... + 9337811.

It is an arithmetic number, because the mean of its divisors is an integer number (2248578221040).

Almost surely, 2^{31320311210321} is an apocalyptic number.

It is an amenable number.

31320311210321 is a deficient number, since it is larger than the sum of its proper divisors (4656940326319).

31320311210321 is a wasteful number, since it uses less digits than its factorization.

31320311210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14294624.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31320311210321 its reverse (12301211302313), we get a palindrome (43621522512634).

The spelling of 31320311210321 in words is "thirty-one trillion, three hundred twenty billion, three hundred eleven million, two hundred ten thousand, three hundred twenty-one".