20221100332021 has 4 divisors (see below), whose sum is σ = 20226310616844. Its totient is φ = 20215890047200.

The previous prime is 20221100331983. The next prime is 20221100332231. The reversal of 20221100332021 is 12023300112202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8639125899121 + 11581974432900 = 2939239^2 + 3403230^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221100332021 - 2¹¹ = 20221100329973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20221100332021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221100302021) 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, 2605136590 + ... + 2605144351.

It is an arithmetic number, because the mean of its divisors is an integer number (5056577654211).

Almost surely, 2^{20221100332021} is an apocalyptic number.

It is an amenable number.

20221100332021 is a deficient number, since it is larger than the sum of its proper divisors (5210284823).

20221100332021 is an equidigital number, since it uses as much as digits as its factorization.

20221100332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210284822.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20221100332021 its reverse (12023300112202), we get a palindrome (32244400444223).

The spelling of 20221100332021 in words is "twenty trillion, two hundred twenty-one billion, one hundred million, three hundred thirty-two thousand, twenty-one".