22220111210021 has 16 divisors (see below), whose sum is σ = 22507222974720. Its totient is φ = 21935251612800.

The previous prime is 22220111209993. The next prime is 22220111210071. The reversal of 22220111210021 is 12001211102222.

It is a cyclic number.

It is not a de Polignac number, because 22220111210021 - 2³⁰ = 22219037468197 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 (22220111210071) 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, 15558611 + ... + 16926623.

It is an arithmetic number, because the mean of its divisors is an integer number (1406701435920).

Almost surely, 2^{22220111210021} is an apocalyptic number.

It is an amenable number.

22220111210021 is a deficient number, since it is larger than the sum of its proper divisors (287111764699).

22220111210021 is a wasteful number, since it uses less digits than its factorization.

22220111210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368836.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22220111210021 its reverse (12001211102222), we get a palindrome (34221322312243).

The spelling of 22220111210021 in words is "twenty-two trillion, two hundred twenty billion, one hundred eleven million, two hundred ten thousand, twenty-one".