22121321221 has 8 divisors (see below), whose sum is σ = 22197150720. Its totient is φ = 22045616208.

The previous prime is 22121321177. The next prime is 22121321263. The reversal of 22121321221 is 12212312122.

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 22121321221 - 2²⁹ = 21584450309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121322221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332100 + ... + 393106.

It is an arithmetic number, because the mean of its divisors is an integer number (2774643840).

Almost surely, 2^22121321221 is an apocalyptic number.

It is an amenable number.

22121321221 is a deficient number, since it is larger than the sum of its proper divisors (75829499).

22121321221 is an equidigital number, since it uses as much as digits as its factorization.

22121321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62243.

The product of its digits is 192, while the sum is 19.

Adding to 22121321221 its reverse (12212312122), we get a palindrome (34333633343).

Subtracting from 22121321221 its reverse (12212312122), we obtain a palindrome (9909009099).

The spelling of 22121321221 in words is "twenty-two billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred twenty-one".