31012133321 has 8 divisors (see below), whose sum is σ = 33401545800. Its totient is φ = 28623272832.

The previous prime is 31012133263. The next prime is 31012133353. The reversal of 31012133321 is 12333121013.

It can be written as a sum of positive squares in 4 ways, for example, as 2168206096 + 28843927225 = 46564^2 + 169835^2 .

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 31012133321 - 2²⁶ = 30945024457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31012133293 and 31012133302.

It is not an unprimeable number, because it can be changed into a prime (31012133371) 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, 17396 + ... + 249653.

It is an arithmetic number, because the mean of its divisors is an integer number (4175193225).

Almost surely, 2^31012133321 is an apocalyptic number.

It is an amenable number.

31012133321 is a deficient number, since it is larger than the sum of its proper divisors (2389412479).

31012133321 is a wasteful number, since it uses less digits than its factorization.

31012133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275995.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31012133321 its reverse (12333121013), we get a palindrome (43345254334).

The spelling of 31012133321 in words is "thirty-one billion, twelve million, one hundred thirty-three thousand, three hundred twenty-one".