22212012202221 has 16 divisors (see below), whose sum is σ = 30637705348800. Its totient is φ = 14297178499968.

The previous prime is 22212012202183. The next prime is 22212012202223. The reversal of 22212012202221 is 12220221021222.

It is not a de Polignac number, because 22212012202221 - 2¹⁴ = 22212012185837 is a prime.

It is a super-2 number, since 2×22212012202221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212012202223) 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, 4246785 + ... + 7903113.

It is an arithmetic number, because the mean of its divisors is an integer number (1914856584300).

Almost surely, 2^{22212012202221} is an apocalyptic number.

It is an amenable number.

22212012202221 is a deficient number, since it is larger than the sum of its proper divisors (8425693146579).

22212012202221 is a wasteful number, since it uses less digits than its factorization.

22212012202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726188.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22212012202221 its reverse (12220221021222), we get a palindrome (34432233223443).

The spelling of 22212012202221 in words is "twenty-two trillion, two hundred twelve billion, twelve million, two hundred two thousand, two hundred twenty-one".