31310122121 has 8 divisors (see below), whose sum is σ = 31730643840. Its totient is φ = 30890631312.

The previous prime is 31310122037. The next prime is 31310122127. The reversal of 31310122121 is 12122101313.

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 31310122121 - 2²⁶ = 31243013257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31310122121.

It is not an unprimeable number, because it can be changed into a prime (31310122127) 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, 196481 + ... + 318158.

It is an arithmetic number, because the mean of its divisors is an integer number (3966330480).

Almost surely, 2^31310122121 is an apocalyptic number.

It is an amenable number.

31310122121 is a deficient number, since it is larger than the sum of its proper divisors (420521719).

31310122121 is an equidigital number, since it uses as much as digits as its factorization.

31310122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515455.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31310122121 its reverse (12122101313), we get a palindrome (43432223434).

The spelling of 31310122121 in words is "thirty-one billion, three hundred ten million, one hundred twenty-two thousand, one hundred twenty-one".