22102122021221 has 4 divisors (see below), whose sum is σ = 24111405841344. Its totient is φ = 20092838201100.

The previous prime is 22102122021191. The next prime is 22102122021257. The reversal of 22102122021221 is 12212022120122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22102122021221 - 2¹⁸ = 22102121759077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102122021193 and 22102122021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102122021281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004641910045 + ... + 1004641910066.

It is an arithmetic number, because the mean of its divisors is an integer number (6027851460336).

Almost surely, 2^{22102122021221} is an apocalyptic number.

It is an amenable number.

22102122021221 is a deficient number, since it is larger than the sum of its proper divisors (2009283820123).

22102122021221 is a wasteful number, since it uses less digits than its factorization.

22102122021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009283820122.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22102122021221 its reverse (12212022120122), we get a palindrome (34314144141343).

The spelling of 22102122021221 in words is "twenty-two trillion, one hundred two billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty-one".