22200000212221 has 8 divisors (see below), whose sum is σ = 23908582302584. Its totient is φ = 20491545231360.

The previous prime is 22200000212129. The next prime is 22200000212227. The reversal of 22200000212221 is 12221200000222.

It can be written as a sum of positive squares in 4 ways, for example, as 721996900 + 22199278215321 = 26870^2 + 4711611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22200000212221 - 2²³ = 22199991823613 is a prime.

It is a super-2 number, since 2×22200000212221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22200000212195 and 22200000212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200000212227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31414476 + ... + 32113381.

It is an arithmetic number, because the mean of its divisors is an integer number (2988572787823).

Almost surely, 2^{22200000212221} is an apocalyptic number.

It is an amenable number.

22200000212221 is a deficient number, since it is larger than the sum of its proper divisors (1708582090363).

22200000212221 is a wasteful number, since it uses less digits than its factorization.

22200000212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63554751.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22200000212221 its reverse (12221200000222), we get a palindrome (34421200212443).

The spelling of 22200000212221 in words is "twenty-two trillion, two hundred billion, two hundred twelve thousand, two hundred twenty-one".