22012120220221 has 16 divisors (see below), whose sum is σ = 23554721151360. Its totient is φ = 20519420922880.

The previous prime is 22012120220201. The next prime is 22012120220239. The reversal of 22012120220221 is 12202202121022.

It is a cyclic number.

It is not a de Polignac number, because 22012120220221 - 2³¹ = 22009972736573 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 (22012120220201) 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, 11687275 + ... + 13439368.

It is an arithmetic number, because the mean of its divisors is an integer number (1472170071960).

Almost surely, 2^{22012120220221} is an apocalyptic number.

It is an amenable number.

22012120220221 is a deficient number, since it is larger than the sum of its proper divisors (1542600931139).

22012120220221 is a wasteful number, since it uses less digits than its factorization.

22012120220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25127636.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22012120220221 its reverse (12202202121022), we get a palindrome (34214322341243).

The spelling of 22012120220221 in words is "twenty-two trillion, twelve billion, one hundred twenty million, two hundred twenty thousand, two hundred twenty-one".