22002321221 has 8 divisors (see below), whose sum is σ = 22541148504. Its totient is φ = 21463598080.

The previous prime is 22002321217. The next prime is 22002321223. The reversal of 22002321221 is 12212320022.

It can be written as a sum of positive squares in 4 ways, for example, as 264062500 + 21738258721 = 16250^2 + 147439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22002321221 - 2² = 22002321217 is a prime.

It is a super-2 number, since 2×22002321221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22002321221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002321223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562331 + ... + 600183.

It is an arithmetic number, because the mean of its divisors is an integer number (2817643563).

Almost surely, 2^22002321221 is an apocalyptic number.

It is an amenable number.

22002321221 is a deficient number, since it is larger than the sum of its proper divisors (538827283).

22002321221 is a wasteful number, since it uses less digits than its factorization.

22002321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52071.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22002321221 its reverse (12212320022), we get a palindrome (34214641243).

The spelling of 22002321221 in words is "twenty-two billion, two million, three hundred twenty-one thousand, two hundred twenty-one".