31310221203 has 6 divisors (see below), whose sum is σ = 45225875084. Its totient is φ = 20873480796.

The previous prime is 31310221133. The next prime is 31310221207. The reversal of 31310221203 is 30212201313.

It is not a de Polignac number, because 31310221203 - 2⁹ = 31310220691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310221207) 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, 1739456725 + ... + 1739456742.

Almost surely, 2^31310221203 is an apocalyptic number.

31310221203 is a deficient number, since it is larger than the sum of its proper divisors (13915653881).

31310221203 is a wasteful number, since it uses less digits than its factorization.

31310221203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478913473 (or 3478913470 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31310221203 its reverse (30212201313), we get a palindrome (61522422516).

The spelling of 31310221203 in words is "thirty-one billion, three hundred ten million, two hundred twenty-one thousand, two hundred three".