22221010021 has 8 divisors (see below), whose sum is σ = 25397461440. Its totient is φ = 19045063968.

The previous prime is 22221010013. The next prime is 22221010069. The reversal of 22221010021 is 12001012222.

It is a happy number.

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

It is not a de Polignac number, because 22221010021 - 2³ = 22221010013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221009983 and 22221010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221010121) 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, 26896 + ... + 212521.

It is an arithmetic number, because the mean of its divisors is an integer number (3174682680).

Almost surely, 2^22221010021 is an apocalyptic number.

It is an amenable number.

22221010021 is a deficient number, since it is larger than the sum of its proper divisors (3176451419).

22221010021 is a wasteful number, since it uses less digits than its factorization.

22221010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252683.

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

Adding to 22221010021 its reverse (12001012222), we get a palindrome (34222022243).

The spelling of 22221010021 in words is "twenty-two billion, two hundred twenty-one million, ten thousand, twenty-one".