22121323011221 has 4 divisors (see below), whose sum is σ = 25281512012832. Its totient is φ = 18961134009612.

The previous prime is 22121323011217. The next prime is 22121323011257. The reversal of 22121323011221 is 12211032312122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22121323011221 - 2² = 22121323011217 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 (22121323011121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580094500795 + ... + 1580094500808.

It is an arithmetic number, because the mean of its divisors is an integer number (6320378003208).

Almost surely, 2^{22121323011221} is an apocalyptic number.

It is an amenable number.

22121323011221 is a deficient number, since it is larger than the sum of its proper divisors (3160189001611).

22121323011221 is an equidigital number, since it uses as much as digits as its factorization.

22121323011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160189001610.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 22121323011221 its reverse (12211032312122), we get a palindrome (34332355323343).

The spelling of 22121323011221 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred twenty-three million, eleven thousand, two hundred twenty-one".