22220021100021 has 32 divisors (see below), whose sum is σ = 30350077470720. Its totient is φ = 14455578252864.

The previous prime is 22220021099993. The next prime is 22220021100023. The reversal of 22220021100021 is 12000112002222.

It is not a de Polignac number, because 22220021100021 - 2⁷ = 22220021099893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220021100023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21456471 + ... + 22468203.

It is an arithmetic number, because the mean of its divisors is an integer number (948439920960).

Almost surely, 2^{22220021100021} is an apocalyptic number.

It is an amenable number.

22220021100021 is a deficient number, since it is larger than the sum of its proper divisors (8130056370699).

22220021100021 is a wasteful number, since it uses less digits than its factorization.

22220021100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012705.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22220021100021 its reverse (12000112002222), we get a palindrome (34220133102243).

The spelling of 22220021100021 in words is "twenty-two trillion, two hundred twenty billion, twenty-one million, one hundred thousand, twenty-one".