2221221323 has 4 divisors (see below), whose sum is σ = 2221363368. Its totient is φ = 2221079280.

The previous prime is 2221221313. The next prime is 2221221347. The reversal of 2221221323 is 3231221222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231221222 = 2 ⋅1615610611.

It is a cyclic number.

It is not a de Polignac number, because 2221221323 - 2¹⁰ = 2221220299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221221295 and 2221221304.

It is not an unprimeable number, because it can be changed into a prime (2221221313) 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, 44186 + ... + 79967.

It is an arithmetic number, because the mean of its divisors is an integer number (555340842).

Almost surely, 2^2221221323 is an apocalyptic number.

2221221323 is a deficient number, since it is larger than the sum of its proper divisors (142045).

2221221323 is a wasteful number, since it uses less digits than its factorization.

2221221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142044.

The product of its digits is 576, while the sum is 20.

The square root of 2221221323 is about 47129.8347440345. The cubic root of 2221221323 is about 1304.7599315691.

Adding to 2221221323 its reverse (3231221222), we get a palindrome (5452442545).

The spelling of 2221221323 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-three".