22220232120021 has 16 divisors (see below), whose sum is σ = 32935199306240. Its totient is φ = 13232892576960.

The previous prime is 22220232119983. The next prime is 22220232120043. The reversal of 22220232120021 is 12002123202222.

It is not a de Polignac number, because 22220232120021 - 2¹³ = 22220232111829 is a prime.

It is a super-2 number, since 2×22220232120021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22220232120021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220232124021) 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, 9189507526 + ... + 9189509943.

It is an arithmetic number, because the mean of its divisors is an integer number (2058449956640).

Almost surely, 2^{22220232120021} is an apocalyptic number.

It is an amenable number.

22220232120021 is a deficient number, since it is larger than the sum of its proper divisors (10714967186219).

22220232120021 is a wasteful number, since it uses less digits than its factorization.

22220232120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18379017516.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22220232120021 its reverse (12002123202222), we get a palindrome (34222355322243).

The spelling of 22220232120021 in words is "twenty-two trillion, two hundred twenty billion, two hundred thirty-two million, one hundred twenty thousand, twenty-one".