22000222012221 has 144 divisors (see below), whose sum is σ = 33778103673600. Its totient is φ = 13780943382528.

The previous prime is 22000222012211. The next prime is 22000222012259. The reversal of 22000222012221 is 12221022200022.

22000222012221 is a `hidden beast` number, since 220 + 0 + 0 + 2 + 220 + 1 + 2 + 221 = 666.

It is not a de Polignac number, because 22000222012221 - 2²⁷ = 22000087794493 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22000222012194 and 22000222012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000222012211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 50114400720 + ... + 50114401158.

It is an arithmetic number, because the mean of its divisors is an integer number (234570164400).

Almost surely, 2^{22000222012221} is an apocalyptic number.

It is an amenable number.

22000222012221 is a deficient number, since it is larger than the sum of its proper divisors (11777881661379).

22000222012221 is a wasteful number, since it uses less digits than its factorization.

22000222012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22000222012221 its reverse (12221022200022), we get a palindrome (34221244212243).

The spelling of 22000222012221 in words is "twenty-two trillion, two hundred twenty-two million, twelve thousand, two hundred twenty-one".