31311002122 has 16 divisors (see below), whose sum is σ = 47693626344. Its totient is φ = 15414840000.

The previous prime is 31311002113. The next prime is 31311002123. The reversal of 31311002122 is 22120011313.

It can be written as a sum of positive squares in 4 ways, for example, as 28200820761 + 3110181361 = 167931^2 + 55769^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31311002096 and 31311002105.

It is not an unprimeable number, because it can be changed into a prime (31311002123) 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, 391629 + ... + 464752.

Almost surely, 2^31311002122 is an apocalyptic number.

31311002122 is a deficient number, since it is larger than the sum of its proper divisors (16382624222).

31311002122 is a wasteful number, since it uses less digits than its factorization.

31311002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856665.

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

Adding to 31311002122 its reverse (22120011313), we get a palindrome (53431013435).

The spelling of 31311002122 in words is "thirty-one billion, three hundred eleven million, two thousand, one hundred twenty-two".