22112222101021 has 8 divisors (see below), whose sum is σ = 23814259290360. Its totient is φ = 20410341629952.

The previous prime is 22112222100929. The next prime is 22112222101043. The reversal of 22112222101021 is 12010122221122.

It can be written as a sum of positive squares in 4 ways, for example, as 314672121 + 22111907428900 = 17739^2 + 4702330^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22112222101021 - 2¹¹ = 22112222098973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22112222101021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112222107021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38886436 + ... + 39450973.

It is an arithmetic number, because the mean of its divisors is an integer number (2976782411295).

Almost surely, 2^{22112222101021} is an apocalyptic number.

It is an amenable number.

22112222101021 is a deficient number, since it is larger than the sum of its proper divisors (1702037189339).

22112222101021 is a wasteful number, since it uses less digits than its factorization.

22112222101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78359135.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22112222101021 its reverse (12010122221122), we get a palindrome (34122344322143).

The spelling of 22112222101021 in words is "twenty-two trillion, one hundred twelve billion, two hundred twenty-two million, one hundred one thousand, twenty-one".