31031021203 has 12 divisors (see below), whose sum is σ = 38874027360. Its totient is φ = 24552016272.

The previous prime is 31031021201. The next prime is 31031021209. The reversal of 31031021203 is 30212013013.

It is not a de Polignac number, because 31031021203 - 2¹ = 31031021201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31031021201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24356523 + ... + 24357796.

It is an arithmetic number, because the mean of its divisors is an integer number (3239502280).

Almost surely, 2^31031021203 is an apocalyptic number.

31031021203 is a deficient number, since it is larger than the sum of its proper divisors (7843006157).

31031021203 is a wasteful number, since it uses less digits than its factorization.

31031021203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48714346 (or 48714339 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31031021203 its reverse (30212013013), we get a palindrome (61243034216).

The spelling of 31031021203 in words is "thirty-one billion, thirty-one million, twenty-one thousand, two hundred three".