31300120123 has 16 divisors (see below), whose sum is σ = 32966196480. Its totient is φ = 29677535776.

The previous prime is 31300120087. The next prime is 31300120133. The reversal of 31300120123 is 32102100313.

It is a de Polignac number, because none of the positive numbers 2^k-31300120123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31300120097 and 31300120106.

It is not an unprimeable number, because it can be changed into a prime (31300120133) 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, 363036 + ... + 440902.

It is an arithmetic number, because the mean of its divisors is an integer number (2060387280).

Almost surely, 2^31300120123 is an apocalyptic number.

31300120123 is a deficient number, since it is larger than the sum of its proper divisors (1666076357).

31300120123 is a wasteful number, since it uses less digits than its factorization.

31300120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78146.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31300120123 its reverse (32102100313), we get a palindrome (63402220436).

The spelling of 31300120123 in words is "thirty-one billion, three hundred million, one hundred twenty thousand, one hundred twenty-three".