31311211123123 has 8 divisors (see below), whose sum is σ = 33153380214192. Its totient is φ = 29469079047936.

The previous prime is 31311211123111. The next prime is 31311211123169. The reversal of 31311211123123 is 32132111211313.

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

It is a cyclic number.

It is not a de Polignac number, because 31311211123123 - 2³⁷ = 31173772169651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311211123723) 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, 7502965 + ... + 10904902.

It is an arithmetic number, because the mean of its divisors is an integer number (4144172526774).

Almost surely, 2^{31311211123123} is an apocalyptic number.

31311211123123 is a deficient number, since it is larger than the sum of its proper divisors (1842169091069).

31311211123123 is a wasteful number, since it uses less digits than its factorization.

31311211123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18507941.

The product of its digits is 648, while the sum is 25.

Adding to 31311211123123 its reverse (32132111211313), we get a palindrome (63443322334436).

The spelling of 31311211123123 in words is "thirty-one trillion, three hundred eleven billion, two hundred eleven million, one hundred twenty-three thousand, one hundred twenty-three".