2222132221 has 4 divisors (see below), whose sum is σ = 2298757500. Its totient is φ = 2145506944.

The previous prime is 2222132179. The next prime is 2222132233. The reversal of 2222132221 is 1222312222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 778968100 + 1443164121 = 27910^2 + 37989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222132221 - 2⁷ = 2222132093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222132261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38312596 + ... + 38312653.

It is an arithmetic number, because the mean of its divisors is an integer number (574689375).

Almost surely, 2^2222132221 is an apocalyptic number.

It is an amenable number.

2222132221 is a deficient number, since it is larger than the sum of its proper divisors (76625279).

2222132221 is an equidigital number, since it uses as much as digits as its factorization.

2222132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76625278.

The product of its digits is 384, while the sum is 19.

The square root of 2222132221 is about 47139.4974623192. The cubic root of 2222132221 is about 1304.9382630082.

Adding to 2222132221 its reverse (1222312222), we get a palindrome (3444444443).

The spelling of 2222132221 in words is "two billion, two hundred twenty-two million, one hundred thirty-two thousand, two hundred twenty-one".