31110112202221 has 16 divisors (see below), whose sum is σ = 34283937909760. Its totient is φ = 28047882985920.

The previous prime is 31110112202203. The next prime is 31110112202231. The reversal of 31110112202221 is 12220221101113.

It is a cyclic number.

It is not a de Polignac number, because 31110112202221 - 2²⁹ = 31109575331309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31110112202231) 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, 10823860 + ... + 13393138.

It is an arithmetic number, because the mean of its divisors is an integer number (2142746119360).

Almost surely, 2^{31110112202221} is an apocalyptic number.

It is an amenable number.

31110112202221 is a deficient number, since it is larger than the sum of its proper divisors (3173825707539).

31110112202221 is a wasteful number, since it uses less digits than its factorization.

31110112202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590996.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 31110112202221 its reverse (12220221101113), we get a palindrome (43330333303334).

The spelling of 31110112202221 in words is "thirty-one trillion, one hundred ten billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".