31112123103 has 12 divisors (see below), whose sum is σ = 44943189720. Its totient is φ = 20739820176.

The previous prime is 31112123083. The next prime is 31112123143. The reversal of 31112123103 is 30132121113.

31112123103 is a `hidden beast` number, since 311 + 121 + 231 + 0 + 3 = 666.

It is not a de Polignac number, because 31112123103 - 2⁵ = 31112123071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112123143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2701 + ... + 249462.

It is an arithmetic number, because the mean of its divisors is an integer number (3745265810).

Almost surely, 2^31112123103 is an apocalyptic number.

31112123103 is a deficient number, since it is larger than the sum of its proper divisors (13831066617).

31112123103 is a wasteful number, since it uses less digits than its factorization.

31112123103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265878 (or 265875 counting only the distinct ones).

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

Adding to 31112123103 its reverse (30132121113), we get a palindrome (61244244216).

The spelling of 31112123103 in words is "thirty-one billion, one hundred twelve million, one hundred twenty-three thousand, one hundred three".