31010123123 has 4 divisors (see below), whose sum is σ = 35440140720. Its totient is φ = 26580105528.

The previous prime is 31010123101. The next prime is 31010123141. The reversal of 31010123123 is 32132101013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31010123123 - 2¹⁶ = 31010057587 is a prime.

It is a super-2 number, since 2×31010123123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31010123323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215008788 + ... + 2215008801.

It is an arithmetic number, because the mean of its divisors is an integer number (8860035180).

Almost surely, 2^31010123123 is an apocalyptic number.

31010123123 is a deficient number, since it is larger than the sum of its proper divisors (4430017597).

31010123123 is an equidigital number, since it uses as much as digits as its factorization.

31010123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430017596.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31010123123 its reverse (32132101013), we get a palindrome (63142224136).

The spelling of 31010123123 in words is "thirty-one billion, ten million, one hundred twenty-three thousand, one hundred twenty-three".