31113021203 has 4 divisors (see below), whose sum is σ = 33941477688. Its totient is φ = 28284564720.

The previous prime is 31113021197. The next prime is 31113021221. The reversal of 31113021203 is 30212031113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31113021203 - 2⁴ = 31113021187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31113021293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1414228226 + ... + 1414228247.

It is an arithmetic number, because the mean of its divisors is an integer number (8485369422).

Almost surely, 2^31113021203 is an apocalyptic number.

31113021203 is a deficient number, since it is larger than the sum of its proper divisors (2828456485).

31113021203 is a wasteful number, since it uses less digits than its factorization.

31113021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828456484.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31113021203 its reverse (30212031113), we get a palindrome (61325052316).

The spelling of 31113021203 in words is "thirty-one billion, one hundred thirteen million, twenty-one thousand, two hundred three".