22100001002221 has 4 divisors (see below), whose sum is σ = 22274016758272. Its totient is φ = 21925985246172.

The previous prime is 22100001002203. The next prime is 22100001002251. The reversal of 22100001002221 is 12220010000122.

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 22100001002221 - 2¹⁷ = 22100000871149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100001002251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87007877835 + ... + 87007878088.

It is an arithmetic number, because the mean of its divisors is an integer number (5568504189568).

Almost surely, 2^{22100001002221} is an apocalyptic number.

It is an amenable number.

22100001002221 is a deficient number, since it is larger than the sum of its proper divisors (174015756051).

22100001002221 is a wasteful number, since it uses less digits than its factorization.

22100001002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174015756050.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22100001002221 its reverse (12220010000122), we get a palindrome (34320011002343).

The spelling of 22100001002221 in words is "twenty-two trillion, one hundred billion, one million, two thousand, two hundred twenty-one".