2223121321 has 4 divisors (see below), whose sum is σ = 2294834944. Its totient is φ = 2151407700.

The previous prime is 2223121279. The next prime is 2223121333. The reversal of 2223121321 is 1231213222.

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 2223121321 - 2⁷ = 2223121193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2223121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35856765 + ... + 35856826.

It is an arithmetic number, because the mean of its divisors is an integer number (573708736).

Almost surely, 2^2223121321 is an apocalyptic number.

It is an amenable number.

2223121321 is a deficient number, since it is larger than the sum of its proper divisors (71713623).

2223121321 is an equidigital number, since it uses as much as digits as its factorization.

2223121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71713622.

The product of its digits is 288, while the sum is 19.

The square root of 2223121321 is about 47149.9874973472. The cubic root of 2223121321 is about 1305.1318492953.

Adding to 2223121321 its reverse (1231213222), we get a palindrome (3454334543).

The spelling of 2223121321 in words is "two billion, two hundred twenty-three million, one hundred twenty-one thousand, three hundred twenty-one".