20222100122221 has 4 divisors (see below), whose sum is σ = 20323718716000. Its totient is φ = 20120481528444.

The previous prime is 20222100122173. The next prime is 20222100122381. The reversal of 20222100122221 is 12222100122202.

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 20222100122221 - 2¹⁵ = 20222100089453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222100122621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50809296591 + ... + 50809296988.

It is an arithmetic number, because the mean of its divisors is an integer number (5080929679000).

Almost surely, 2^{20222100122221} is an apocalyptic number.

It is an amenable number.

20222100122221 is a deficient number, since it is larger than the sum of its proper divisors (101618593779).

20222100122221 is a wasteful number, since it uses less digits than its factorization.

20222100122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101618593778.

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

Subtracting from 20222100122221 its sum of digits (19), we obtain a palindrome (20222100122202).

Adding to 20222100122221 its reverse (12222100122202), we get a palindrome (32444200244423).

The spelling of 20222100122221 in words is "twenty trillion, two hundred twenty-two billion, one hundred million, one hundred twenty-two thousand, two hundred twenty-one".