31020120123 has 8 divisors (see below), whose sum is σ = 41574462288. Its totient is φ = 20572929024.

The previous prime is 31020120113. The next prime is 31020120227. The reversal of 31020120123 is 32102102013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31020120123 - 2⁴ = 31020120107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31020120113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26787090 + ... + 26788247.

It is an arithmetic number, because the mean of its divisors is an integer number (5196807786).

Almost surely, 2^31020120123 is an apocalyptic number.

31020120123 is a deficient number, since it is larger than the sum of its proper divisors (10554342165).

31020120123 is a wasteful number, since it uses less digits than its factorization.

31020120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53575533.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020120123 its reverse (32102102013), we get a palindrome (63122222136).

The spelling of 31020120123 in words is "thirty-one billion, twenty million, one hundred twenty thousand, one hundred twenty-three".