31321122000231 has 64 divisors (see below), whose sum is σ = 49485227294720. Its totient is φ = 17243831473920.

The previous prime is 31321122000197. The next prime is 31321122000239. The reversal of 31321122000231 is 13200022112313.

It is not a de Polignac number, because 31321122000231 - 2¹¹ = 31321121998183 is a prime.

It is a super-2 number, since 2×31321122000231² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31321122000198 and 31321122000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321122000239) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 207923766 + ... + 208074348.

It is an arithmetic number, because the mean of its divisors is an integer number (773206676480).

Almost surely, 2^{31321122000231} is an apocalyptic number.

31321122000231 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31321122000231 is a deficient number, since it is larger than the sum of its proper divisors (18164105294489).

31321122000231 is a wasteful number, since it uses less digits than its factorization.

31321122000231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152036.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31321122000231 its reverse (13200022112313), we get a palindrome (44521144112544).

The spelling of 31321122000231 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred twenty-two million, two hundred thirty-one", and thus it is an aban number.