22200101211221 has 4 divisors (see below), whose sum is σ = 22222103294700. Its totient is φ = 22178099127744.

The previous prime is 22200101211187. The next prime is 22200101211263. The reversal of 22200101211221 is 12211210100222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10356103248100 + 11843997963121 = 3218090^2 + 3441511^2 .

It is a cyclic number.

It is not a de Polignac number, because 22200101211221 - 2⁶ = 22200101211157 is a prime.

It is a super-2 number, since 2×22200101211221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22200101211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200101211271) 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, 11001040226 + ... + 11001042243.

It is an arithmetic number, because the mean of its divisors is an integer number (5555525823675).

Almost surely, 2^{22200101211221} is an apocalyptic number.

It is an amenable number.

22200101211221 is a deficient number, since it is larger than the sum of its proper divisors (22002083479).

22200101211221 is a wasteful number, since it uses less digits than its factorization.

22200101211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22002083478.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22200101211221 its reverse (12211210100222), we get a palindrome (34411311311443).

The spelling of 22200101211221 in words is "twenty-two trillion, two hundred billion, one hundred one million, two hundred eleven thousand, two hundred twenty-one".