31122110023231 has 4 divisors (see below), whose sum is σ = 31632308548264. Its totient is φ = 30611911498200.

The previous prime is 31122110023201. The next prime is 31122110023309. The reversal of 31122110023231 is 13232001122113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31122110023231 - 2²³ = 31122101634623 is a prime.

It is a super-2 number, since 2×31122110023231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122110023201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255099262425 + ... + 255099262546.

It is an arithmetic number, because the mean of its divisors is an integer number (7908077137066).

Almost surely, 2^{31122110023231} is an apocalyptic number.

31122110023231 is a deficient number, since it is larger than the sum of its proper divisors (510198525033).

31122110023231 is an equidigital number, since it uses as much as digits as its factorization.

31122110023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510198525032.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31122110023231 its reverse (13232001122113), we get a palindrome (44354111145344).

The spelling of 31122110023231 in words is "thirty-one trillion, one hundred twenty-two billion, one hundred ten million, twenty-three thousand, two hundred thirty-one".