22021101331221 has 4 divisors (see below), whose sum is σ = 29361468441632. Its totient is φ = 14680734220812.

The previous prime is 22021101331183. The next prime is 22021101331249. The reversal of 22021101331221 is 12213310112022.

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 not a de Polignac number, because 22021101331221 - 2⁶ = 22021101331157 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 (22021101331261) 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, 3670183555201 + ... + 3670183555206.

It is an arithmetic number, because the mean of its divisors is an integer number (7340367110408).

Almost surely, 2^{22021101331221} is an apocalyptic number.

It is an amenable number.

22021101331221 is a deficient number, since it is larger than the sum of its proper divisors (7340367110411).

22021101331221 is an equidigital number, since it uses as much as digits as its factorization.

22021101331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340367110410.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 22021101331221 its reverse (12213310112022), we get a palindrome (34234411443243).

The spelling of 22021101331221 in words is "twenty-two trillion, twenty-one billion, one hundred one million, three hundred thirty-one thousand, two hundred twenty-one".