20122222102221 has 4 divisors (see below), whose sum is σ = 26829629469632. Its totient is φ = 13414814734812.

The previous prime is 20122222102183. The next prime is 20122222102289. The reversal of 20122222102221 is 12220122222102.

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 not a de Polignac number, because 20122222102221 - 2⁷ = 20122222102093 is a prime.

It is a super-2 number, since 2×20122222102221² (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 (20122222102291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353703683701 + ... + 3353703683706.

It is an arithmetic number, because the mean of its divisors is an integer number (6707407367408).

Almost surely, 2^{20122222102221} is an apocalyptic number.

It is an amenable number.

20122222102221 is a deficient number, since it is larger than the sum of its proper divisors (6707407367411).

20122222102221 is an equidigital number, since it uses as much as digits as its factorization.

20122222102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707407367410.

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

Adding to 20122222102221 its reverse (12220122222102), we get a palindrome (32342344324323).

The spelling of 20122222102221 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-one".