31102223221021 has 16 divisors (see below), whose sum is σ = 34367153845248. Its totient is φ = 27997044768000.

The previous prime is 31102223221019. The next prime is 31102223221033. The reversal of 31102223221021 is 12012232220113.

It is not a de Polignac number, because 31102223221021 - 2¹ = 31102223221019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31102223220983 and 31102223221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102223221001) 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, 363930 + ... + 7895371.

It is an arithmetic number, because the mean of its divisors is an integer number (2147947115328).

Almost surely, 2^{31102223221021} is an apocalyptic number.

It is an amenable number.

31102223221021 is a deficient number, since it is larger than the sum of its proper divisors (3264930624227).

31102223221021 is a wasteful number, since it uses less digits than its factorization.

31102223221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8268972.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31102223221021 its reverse (12012232220113), we get a palindrome (43114455441134).

The spelling of 31102223221021 in words is "thirty-one trillion, one hundred two billion, two hundred twenty-three million, two hundred twenty-one thousand, twenty-one".