31113223300021 has 16 divisors (see below), whose sum is σ = 31863825878400. Its totient is φ = 30368719592640.

The previous prime is 31113223300007. The next prime is 31113223300051. The reversal of 31113223300021 is 12000332231113.

It is a cyclic number.

It is not a de Polignac number, because 31113223300021 - 2⁵ = 31113223299989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31113223299965 and 31113223300001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113223300051) 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, 80185146 + ... + 80572228.

It is an arithmetic number, because the mean of its divisors is an integer number (1991489117400).

Almost surely, 2^{31113223300021} is an apocalyptic number.

It is an amenable number.

31113223300021 is a deficient number, since it is larger than the sum of its proper divisors (750602578379).

31113223300021 is a wasteful number, since it uses less digits than its factorization.

31113223300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394956.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31113223300021 its reverse (12000332231113), we get a palindrome (43113555531134).

The spelling of 31113223300021 in words is "thirty-one trillion, one hundred thirteen billion, two hundred twenty-three million, three hundred thousand, twenty-one".