31111313103 has 24 divisors (see below), whose sum is σ = 48874556640. Its totient is φ = 18955857600.

The previous prime is 31111313081. The next prime is 31111313111. The reversal of 31111313103 is 30131311113.

31111313103 is a `hidden beast` number, since 311 + 11 + 31 + 310 + 3 = 666.

It is not a de Polignac number, because 31111313103 - 2⁹ = 31111312591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111313153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1304563 + ... + 1328196.

It is an arithmetic number, because the mean of its divisors is an integer number (2036439860).

Almost surely, 2^31111313103 is an apocalyptic number.

31111313103 is a deficient number, since it is larger than the sum of its proper divisors (17763243537).

31111313103 is a wasteful number, since it uses less digits than its factorization.

31111313103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632879 (or 2632876 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

Adding to 31111313103 its reverse (30131311113), we get a palindrome (61242624216).

The spelling of 31111313103 in words is "thirty-one billion, one hundred eleven million, three hundred thirteen thousand, one hundred three".