20221222102221 has 16 divisors (see below), whose sum is σ = 30813823040000. Its totient is φ = 11554784476848.

The previous prime is 20221222102187. The next prime is 20221222102261. The reversal of 20221222102221 is 12220122212202.

It is not a de Polignac number, because 20221222102221 - 2⁹ = 20221222101709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221222102261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7066771 + ... + 9506928.

It is an arithmetic number, because the mean of its divisors is an integer number (1925863940000).

Almost surely, 2^{20221222102221} is an apocalyptic number.

20221222102221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20221222102221 is a deficient number, since it is larger than the sum of its proper divisors (10592600937779).

20221222102221 is a wasteful number, since it uses less digits than its factorization.

20221222102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16631808.

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

Adding to 20221222102221 its reverse (12220122212202), we get a palindrome (32441344314423).

The spelling of 20221222102221 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-one".