20221201320221 has 16 divisors (see below), whose sum is σ = 22123462435200. Its totient is φ = 18329605523520.

The previous prime is 20221201320197. The next prime is 20221201320247. The reversal of 20221201320221 is 12202310212202.

It is a cyclic number.

It is not a de Polignac number, because 20221201320221 - 2³⁸ = 19946323413277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20221201320193 and 20221201320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221201328221) 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 15 ways as a sum of consecutive naturals, for example, 139141031 + ... + 139286283.

It is an arithmetic number, because the mean of its divisors is an integer number (1382716402200).

Almost surely, 2^{20221201320221} is an apocalyptic number.

It is an amenable number.

20221201320221 is a deficient number, since it is larger than the sum of its proper divisors (1902261114979).

20221201320221 is a wasteful number, since it uses less digits than its factorization.

20221201320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181876.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20221201320221 its reverse (12202310212202), we get a palindrome (32423511532423).

The spelling of 20221201320221 in words is "twenty trillion, two hundred twenty-one billion, two hundred one million, three hundred twenty thousand, two hundred twenty-one".