22021210000221 has 4 divisors (see below), whose sum is σ = 29361613333632. Its totient is φ = 14680806666812.

The previous prime is 22021210000189. The next prime is 22021210000243. The reversal of 22021210000221 is 12200001212022.

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 22021210000221 - 2⁵ = 22021210000189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22021210000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021210000021) 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, 3670201666701 + ... + 3670201666706.

It is an arithmetic number, because the mean of its divisors is an integer number (7340403333408).

Almost surely, 2^{22021210000221} is an apocalyptic number.

It is an amenable number.

22021210000221 is a deficient number, since it is larger than the sum of its proper divisors (7340403333411).

22021210000221 is an equidigital number, since it uses as much as digits as its factorization.

22021210000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7340403333410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22021210000221 its reverse (12200001212022), we get a palindrome (34221211212243).

The spelling of 22021210000221 in words is "twenty-two trillion, twenty-one billion, two hundred ten million, two hundred twenty-one", and thus it is an aban number.