22201200121221 has 24 divisors (see below), whose sum is σ = 35083949191200. Its totient is φ = 13416718989600.

The previous prime is 22201200121169. The next prime is 22201200121223. The reversal of 22201200121221 is 12212100210222.

It is a happy number.

22201200121221 is a `hidden beast` number, since 2 + 220 + 1 + 200 + 1 + 21 + 221 = 666.

It is not a de Polignac number, because 22201200121221 - 2¹⁵ = 22201200088453 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22201200121194 and 22201200121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201200121223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321247035 + ... + 321316136.

It is an arithmetic number, because the mean of its divisors is an integer number (1461831216300).

Almost surely, 2^{22201200121221} is an apocalyptic number.

It is an amenable number.

22201200121221 is a deficient number, since it is larger than the sum of its proper divisors (12882749069979).

22201200121221 is a wasteful number, since it uses less digits than its factorization.

22201200121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642563537 (or 642563534 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22201200121221 its reverse (12212100210222), we get a palindrome (34413300331443).

The spelling of 22201200121221 in words is "twenty-two trillion, two hundred one billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-one".