2321222231221 has 4 divisors (see below), whose sum is σ = 2396100367744. Its totient is φ = 2246344094700.

The previous prime is 2321222231197. The next prime is 2321222231227. The reversal of 2321222231221 is 1221322221232.

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 2321222231221 - 2¹⁵ = 2321222198453 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 (2321222231227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37439068215 + ... + 37439068276.

It is an arithmetic number, because the mean of its divisors is an integer number (599025091936).

Almost surely, 2^{2321222231221} is an apocalyptic number.

It is an amenable number.

2321222231221 is a deficient number, since it is larger than the sum of its proper divisors (74878136523).

2321222231221 is an equidigital number, since it uses as much as digits as its factorization.

2321222231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74878136522.

The product of its digits is 2304, while the sum is 25.

Adding to 2321222231221 its reverse (1221322221232), we get a palindrome (3542544452453).

The spelling of 2321222231221 in words is "two trillion, three hundred twenty-one billion, two hundred twenty-two million, two hundred thirty-one thousand, two hundred twenty-one".