22100222201221 has 16 divisors (see below), whose sum is σ = 22590172136448. Its totient is φ = 21611098080000.

The previous prime is 22100222201207. The next prime is 22100222201273. The reversal of 22100222201221 is 12210222200122.

It is a cyclic number.

It is not a de Polignac number, because 22100222201221 - 2⁷ = 22100222201093 is a prime.

It is a super-2 number, since 2×22100222201221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100222201921) 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, 1073180701 + ... + 1073201293.

It is an arithmetic number, because the mean of its divisors is an integer number (1411885758528).

Almost surely, 2^{22100222201221} is an apocalyptic number.

It is an amenable number.

22100222201221 is a deficient number, since it is larger than the sum of its proper divisors (489949935227).

22100222201221 is a wasteful number, since it uses less digits than its factorization.

22100222201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39492.

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

Adding to 22100222201221 its reverse (12210222200122), we get a palindrome (34310444401343).

The spelling of 22100222201221 in words is "twenty-two trillion, one hundred billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".