31322010121 has 6 divisors (see below), whose sum is σ = 32743047050. Its totient is φ = 29960183088.

The previous prime is 31322010103. The next prime is 31322010143. The reversal of 31322010121 is 12101022313.

It can be written as a sum of positive squares in only one way, i.e., 25134614521 + 6187395600 = 158539^2 + 78660^2 .

It is not a de Polignac number, because 31322010121 - 2²⁵ = 31288455689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322010095 and 31322010104.

It is not an unprimeable number, because it can be changed into a prime (31322310121) 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, 29604396 + ... + 29605453.

Almost surely, 2^31322010121 is an apocalyptic number.

It is an amenable number.

31322010121 is a deficient number, since it is larger than the sum of its proper divisors (1421036929).

31322010121 is an equidigital number, since it uses as much as digits as its factorization.

31322010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59209895 (or 59209872 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31322010121 its reverse (12101022313), we get a palindrome (43423032434).

The spelling of 31322010121 in words is "thirty-one billion, three hundred twenty-two million, ten thousand, one hundred twenty-one".