31231321031322 has 12 divisors (see below), whose sum is σ = 67667862234570. Its totient is φ = 10410440343768.

The previous prime is 31231321031249. The next prime is 31231321031327. The reversal of 31231321031322 is 22313012313213.

31231321031322 is a `hidden beast` number, since 3 + 1 + 2 + 3 + 1 + 321 + 0 + 313 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19792186243281 + 11439134788041 = 4448841^2 + 3382179^2 .

It is a super-2 number, since 2×31231321031322² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31231321031327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 867536695297 + ... + 867536695332.

Almost surely, 2^{31231321031322} is an apocalyptic number.

31231321031322 is an abundant number, since it is smaller than the sum of its proper divisors (36436541203248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31231321031322 is a wasteful number, since it uses less digits than its factorization.

31231321031322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735073390637 (or 1735073390634 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31231321031322 its reverse (22313012313213), we get a palindrome (53544333344535).

The spelling of 31231321031322 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty-one million, thirty-one thousand, three hundred twenty-two".