22101200021 has 8 divisors (see below), whose sum is σ = 22264263840. Its totient is φ = 21938194512.

The previous prime is 22101199987. The next prime is 22101200039. The reversal of 22101200021 is 12000210122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22101200021 - 2⁶ = 22101199957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22101199975 and 22101200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101206021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008446 + ... + 1030128.

It is an arithmetic number, because the mean of its divisors is an integer number (2783032980).

Almost surely, 2^22101200021 is an apocalyptic number.

It is an amenable number.

22101200021 is a deficient number, since it is larger than the sum of its proper divisors (163063819).

22101200021 is a wasteful number, since it uses less digits than its factorization.

22101200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29155.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22101200021 its reverse (12000210122), we get a palindrome (34101410143).

The spelling of 22101200021 in words is "twenty-two billion, one hundred one million, two hundred thousand, twenty-one".