22032213221 has 4 divisors (see below), whose sum is σ = 22069747392. Its totient is φ = 21994679052.

The previous prime is 22032213169. The next prime is 22032213233. The reversal of 22032213221 is 12231223022.

It is a happy number.

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 22032213221 - 2²² = 22028018917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22032213193 and 22032213202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22032213241) 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, 18766205 + ... + 18767378.

It is an arithmetic number, because the mean of its divisors is an integer number (5517436848).

Almost surely, 2^22032213221 is an apocalyptic number.

It is an amenable number.

22032213221 is a deficient number, since it is larger than the sum of its proper divisors (37534171).

22032213221 is an equidigital number, since it uses as much as digits as its factorization.

22032213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37534170.

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

Adding to 22032213221 its reverse (12231223022), we get a palindrome (34263436243).

The spelling of 22032213221 in words is "twenty-two billion, thirty-two million, two hundred thirteen thousand, two hundred twenty-one".