22221021121 has 8 divisors (see below), whose sum is σ = 23933154560. Its totient is φ = 20509291152.

The previous prime is 22221021089. The next prime is 22221021139. The reversal of 22221021121 is 12112012222.

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 22221021121 - 2⁵ = 22221021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221021095 and 22221021104.

It is not an unprimeable number, because it can be changed into a prime (22221021191) 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, 18790 + ... + 211648.

It is an arithmetic number, because the mean of its divisors is an integer number (2991644320).

Almost surely, 2^22221021121 is an apocalyptic number.

It is an amenable number.

22221021121 is a deficient number, since it is larger than the sum of its proper divisors (1712133439).

22221021121 is a wasteful number, since it uses less digits than its factorization.

22221021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201735.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22221021121 its reverse (12112012222), we get a palindrome (34333033343).

The spelling of 22221021121 in words is "twenty-two billion, two hundred twenty-one million, twenty-one thousand, one hundred twenty-one".