31312321321331 has 8 divisors (see below), whose sum is σ = 32965230803280. Its totient is φ = 29659901096448.

The previous prime is 31312321321327. The next prime is 31312321321363. The reversal of 31312321321331 is 13312312321313.

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 31312321321331 - 2² = 31312321321327 is a prime.

It is a super-2 number, since 2×31312321321331² (a number of 28 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 = 31312321321294 and 31312321321303.

It is not an unprimeable number, because it can be changed into a prime (31312321321301) 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, 122182886 + ... + 122438891.

It is an arithmetic number, because the mean of its divisors is an integer number (4120653850410).

Almost surely, 2^{31312321321331} is an apocalyptic number.

31312321321331 is a deficient number, since it is larger than the sum of its proper divisors (1652909481949).

31312321321331 is a wasteful number, since it uses less digits than its factorization.

31312321321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244628533.

The product of its digits is 5832, while the sum is 29.

Adding to 31312321321331 its reverse (13312312321313), we get a palindrome (44624633642644).

The spelling of 31312321321331 in words is "thirty-one trillion, three hundred twelve billion, three hundred twenty-one million, three hundred twenty-one thousand, three hundred thirty-one".