23221443222221 has 4 divisors (see below), whose sum is σ = 23221488849312. Its totient is φ = 23221397595132.

The previous prime is 23221443222217. The next prime is 23221443222227. The reversal of 23221443222221 is 12222234412232.

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 23221443222221 - 2² = 23221443222217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221443222227) 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, 22041425 + ... + 23070918.

It is an arithmetic number, because the mean of its divisors is an integer number (5805372212328).

Almost surely, 2^{23221443222221} is an apocalyptic number.

It is an amenable number.

23221443222221 is a deficient number, since it is larger than the sum of its proper divisors (45627091).

23221443222221 is an equidigital number, since it uses as much as digits as its factorization.

23221443222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45627090.

The product of its digits is 36864, while the sum is 32.

Adding to 23221443222221 its reverse (12222234412232), we get a palindrome (35443677634453).

The spelling of 23221443222221 in words is "twenty-three trillion, two hundred twenty-one billion, four hundred forty-three million, two hundred twenty-two thousand, two hundred twenty-one".