3111122221021 has 16 divisors (see below), whose sum is σ = 3218469141888. Its totient is φ = 3005283283200.

The previous prime is 3111122220979. The next prime is 3111122221033. The reversal of 3111122221021 is 1201222211113.

It is a cyclic number.

It is not a de Polignac number, because 3111122221021 - 2⁹ = 3111122220509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3111122221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111122221321) 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, 27354745 + ... + 27468241.

It is an arithmetic number, because the mean of its divisors is an integer number (201154321368).

Almost surely, 2^{3111122221021} is an apocalyptic number.

It is an amenable number.

3111122221021 is a deficient number, since it is larger than the sum of its proper divisors (107346920867).

3111122221021 is a wasteful number, since it uses less digits than its factorization.

3111122221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120132.

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

Adding to 3111122221021 its reverse (1201222211113), we get a palindrome (4312344432134).

The spelling of 3111122221021 in words is "three trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".