22101200221 has 4 divisors (see below), whose sum is σ = 22103014752. Its totient is φ = 22099385692.

The previous prime is 22101200201. The next prime is 22101200239. The reversal of 22101200221 is 12200210122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12200210122 = 2 ⋅6100105061.

It is a cyclic number.

It is not a de Polignac number, because 22101200221 - 2⁹ = 22101199709 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 (22101200201) 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, 888871 + ... + 913396.

It is an arithmetic number, because the mean of its divisors is an integer number (5525753688).

Almost surely, 2^22101200221 is an apocalyptic number.

It is an amenable number.

22101200221 is a deficient number, since it is larger than the sum of its proper divisors (1814531).

22101200221 is a wasteful number, since it uses less digits than its factorization.

22101200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814530.

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

Adding to 22101200221 its reverse (12200210122), we get a palindrome (34301410343).

Subtracting from 22101200221 its reverse (12200210122), we obtain a palindrome (9900990099).

The spelling of 22101200221 in words is "twenty-two billion, one hundred one million, two hundred thousand, two hundred twenty-one".