31113013103 has 4 divisors (see below), whose sum is σ = 31303890648. Its totient is φ = 30922135560.

The previous prime is 31113013093. The next prime is 31113013147. The reversal of 31113013103 is 30131031113.

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 31113013103 - 2¹⁸ = 31112750959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113013193) 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, 95438528 + ... + 95438853.

It is an arithmetic number, because the mean of its divisors is an integer number (7825972662).

Almost surely, 2^31113013103 is an apocalyptic number.

31113013103 is a deficient number, since it is larger than the sum of its proper divisors (190877545).

31113013103 is a wasteful number, since it uses less digits than its factorization.

31113013103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190877544.

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 31113013103 its reverse (30131031113), we get a palindrome (61244044216).

The spelling of 31113013103 in words is "thirty-one billion, one hundred thirteen million, thirteen thousand, one hundred three".