20221022122221 has 4 divisors (see below), whose sum is σ = 26961362829632. Its totient is φ = 13480681414812.

The previous prime is 20221022122219. The next prime is 20221022122271. The reversal of 20221022122221 is 12222122012202.

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 20221022122221 - 2¹ = 20221022122219 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 (20221022122271) 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, 3370170353701 + ... + 3370170353706.

It is an arithmetic number, because the mean of its divisors is an integer number (6740340707408).

Almost surely, 2^{20221022122221} is an apocalyptic number.

It is an amenable number.

20221022122221 is a deficient number, since it is larger than the sum of its proper divisors (6740340707411).

20221022122221 is an equidigital number, since it uses as much as digits as its factorization.

20221022122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740340707410.

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

Adding to 20221022122221 its reverse (12222122012202), we get a palindrome (32443144134423).

The spelling of 20221022122221 in words is "twenty trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".