22021002202221 has 24 divisors (see below), whose sum is σ = 34726681154880. Its totient is φ = 13335708052800.

The previous prime is 22021002202187. The next prime is 22021002202247. The reversal of 22021002202221 is 12220220012022.

22021002202221 is a `hidden beast` number, since 220 + 2 + 1 + 0 + 0 + 220 + 2 + 221 = 666.

It is not a de Polignac number, because 22021002202221 - 2⁷ = 22021002202093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021002202194 and 22021002202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021002202021) 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, 86154145 + ... + 86409366.

It is an arithmetic number, because the mean of its divisors is an integer number (1446945048120).

Almost surely, 2^{22021002202221} is an apocalyptic number.

It is an amenable number.

22021002202221 is a deficient number, since it is larger than the sum of its proper divisors (12705678952659).

22021002202221 is a wasteful number, since it uses less digits than its factorization.

22021002202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172564817 (or 172564814 counting only the distinct ones).

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

Adding to 22021002202221 its reverse (12220220012022), we get a palindrome (34241222214243).

The spelling of 22021002202221 in words is "twenty-two trillion, twenty-one billion, two million, two hundred two thousand, two hundred twenty-one".