31321021203 has 6 divisors (see below), whose sum is σ = 45241475084. Its totient is φ = 20880680796.

The previous prime is 31321021201. The next prime is 31321021261. The reversal of 31321021203 is 30212012313.

It is not a de Polignac number, because 31321021203 - 2¹ = 31321021201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321021201) 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, 1740056725 + ... + 1740056742.

Almost surely, 2^31321021203 is an apocalyptic number.

31321021203 is a deficient number, since it is larger than the sum of its proper divisors (13920453881).

31321021203 is a wasteful number, since it uses less digits than its factorization.

31321021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480113473 (or 3480113470 counting only the distinct ones).

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

Adding to 31321021203 its reverse (30212012313), we get a palindrome (61533033516).

The spelling of 31321021203 in words is "thirty-one billion, three hundred twenty-one million, twenty-one thousand, two hundred three".