22000221100021 has 16 divisors (see below), whose sum is σ = 22354263133888. Its totient is φ = 21648978086400.

The previous prime is 22000221099949. The next prime is 22000221100093. The reversal of 22000221100021 is 12000112200022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22000221099949) and next prime (22000221100093).

It is a cyclic number.

It is not a de Polignac number, because 22000221100021 - 2²³ = 22000212711413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22000221099974 and 22000221100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000221200021) 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, 20370406 + ... + 21423208.

It is an arithmetic number, because the mean of its divisors is an integer number (1397141445868).

Almost surely, 2^{22000221100021} is an apocalyptic number.

It is an amenable number.

22000221100021 is a deficient number, since it is larger than the sum of its proper divisors (354042033867).

22000221100021 is a wasteful number, since it uses less digits than its factorization.

22000221100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054132.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22000221100021 its reverse (12000112200022), we get a palindrome (34000333300043).

The spelling of 22000221100021 in words is "twenty-two trillion, two hundred twenty-one million, one hundred thousand, twenty-one".