31113121203 has 12 divisors (see below), whose sum is σ = 44944799328. Its totient is φ = 20740408080.

The previous prime is 31113121189. The next prime is 31113121213. The reversal of 31113121203 is 30212131113.

31113121203 is a `hidden beast` number, since 311 + 131 + 21 + 203 = 666.

It is not a de Polignac number, because 31113121203 - 2¹⁷ = 31112990131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31113121213) 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, 15828 + ... + 249953.

It is an arithmetic number, because the mean of its divisors is an integer number (3745399944).

Almost surely, 2^31113121203 is an apocalyptic number.

31113121203 is a deficient number, since it is larger than the sum of its proper divisors (13831678125).

31113121203 is a wasteful number, since it uses less digits than its factorization.

31113121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278794 (or 278791 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31113121203 its reverse (30212131113), we get a palindrome (61325252316).

The spelling of 31113121203 in words is "thirty-one billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred three".