22221030021 has 16 divisors (see below), whose sum is σ = 31382549568. Its totient is φ = 13937414400.

The previous prime is 22221029959. The next prime is 22221030037. The reversal of 22221030021 is 12003012222.

It is a happy number.

It is not a de Polignac number, because 22221030021 - 2⁷ = 22221029893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221230021) 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, 59511 + ... + 219051.

It is an arithmetic number, because the mean of its divisors is an integer number (1961409348).

Almost surely, 2^22221030021 is an apocalyptic number.

It is an amenable number.

22221030021 is a deficient number, since it is larger than the sum of its proper divisors (9161519547).

22221030021 is a wasteful number, since it uses less digits than its factorization.

22221030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162292.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 22221030021 its reverse (12003012222), we get a palindrome (34224042243).

The spelling of 22221030021 in words is "twenty-two billion, two hundred twenty-one million, thirty thousand, twenty-one".