31231211120123 has 16 divisors (see below), whose sum is σ = 37528904276160. Its totient is φ = 25422806102400.

The previous prime is 31231211120077. The next prime is 31231211120183. The reversal of 31231211120123 is 32102111213213.

It is a happy number.

It is not a de Polignac number, because 31231211120123 - 2¹⁴ = 31231211103739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231211120183) 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, 1261039508 + ... + 1261064273.

It is an arithmetic number, because the mean of its divisors is an integer number (2345556517260).

Almost surely, 2^{31231211120123} is an apocalyptic number.

31231211120123 is a deficient number, since it is larger than the sum of its proper divisors (6297693156037).

31231211120123 is a wasteful number, since it uses less digits than its factorization.

31231211120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522103878.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31231211120123 its reverse (32102111213213), we get a palindrome (63333322333336).

The spelling of 31231211120123 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred twenty-three".