22203132221 has 4 divisors (see below), whose sum is σ = 22968757500. Its totient is φ = 21437506944.

The previous prime is 22203132199. The next prime is 22203132227. The reversal of 22203132221 is 12223130222.

It is a happy number.

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 11306068900 + 10897063321 = 106330^2 + 104389^2 .

It is a cyclic number.

It is not a de Polignac number, because 22203132221 - 2³⁰ = 21129390397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22203132193 and 22203132202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22203132227) 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, 382812596 + ... + 382812653.

It is an arithmetic number, because the mean of its divisors is an integer number (5742189375).

Almost surely, 2^22203132221 is an apocalyptic number.

It is an amenable number.

22203132221 is a deficient number, since it is larger than the sum of its proper divisors (765625279).

22203132221 is an equidigital number, since it uses as much as digits as its factorization.

22203132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765625278.

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

Adding to 22203132221 its reverse (12223130222), we get a palindrome (34426262443).

The spelling of 22203132221 in words is "twenty-two billion, two hundred three million, one hundred thirty-two thousand, two hundred twenty-one".