31123119999 has 16 divisors (see below), whose sum is σ = 42208010240. Its totient is φ = 20396486880.

The previous prime is 31123119997. The next prime is 31123120001. The reversal of 31123119999 is 99991132113.

It is an interprime number because it is at equal distance from previous prime (31123119997) and next prime (31123120001).

It is not a de Polignac number, because 31123119999 - 2¹ = 31123119997 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 (31123119991) 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, 333187 + ... + 416244.

It is an arithmetic number, because the mean of its divisors is an integer number (2638000640).

Almost surely, 2^31123119999 is an apocalyptic number.

31123119999 is a deficient number, since it is larger than the sum of its proper divisors (11084890241).

31123119999 is a wasteful number, since it uses less digits than its factorization.

31123119999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749670.

The product of its digits is 118098, while the sum is 48.

The spelling of 31123119999 in words is "thirty-one billion, one hundred twenty-three million, one hundred nineteen thousand, nine hundred ninety-nine".