31020012103 has 16 divisors (see below), whose sum is σ = 32014224000. Its totient is φ = 30044574432.

The previous prime is 31020012073. The next prime is 31020012151. The reversal of 31020012103 is 30121002013.

It is a cyclic number.

It is not a de Polignac number, because 31020012103 - 2³³ = 22430077511 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 (31020019103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137676 + ... + 1164622.

It is an arithmetic number, because the mean of its divisors is an integer number (2000889000).

Almost surely, 2^31020012103 is an apocalyptic number.

31020012103 is a deficient number, since it is larger than the sum of its proper divisors (994211897).

31020012103 is a wasteful number, since it uses less digits than its factorization.

31020012103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27294.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31020012103 its reverse (30121002013), we get a palindrome (61141014116).

The spelling of 31020012103 in words is "thirty-one billion, twenty million, twelve thousand, one hundred three".