22444213450221 has 40 divisors (see below), whose sum is σ = 36645159032064. Its totient is φ = 13628364877440.

The previous prime is 22444213450079. The next prime is 22444213450237. The reversal of 22444213450221 is 12205431244422.

22444213450221 is a `hidden beast` number, since 2 + 2 + 4 + 4 + 421 + 3 + 4 + 5 + 0 + 221 = 666.

It is not a de Polignac number, because 22444213450221 - 2²⁵ = 22444179895789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22444213451221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 262850155 + ... + 262935528.

Almost surely, 2^{22444213450221} is an apocalyptic number.

It is an amenable number.

22444213450221 is a deficient number, since it is larger than the sum of its proper divisors (14200945581843).

22444213450221 is a wasteful number, since it uses less digits than its factorization.

22444213450221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525785743 (or 525785734 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 22444213450221 its reverse (12205431244422), we get a palindrome (34649644694643).

The spelling of 22444213450221 in words is "twenty-two trillion, four hundred forty-four billion, two hundred thirteen million, four hundred fifty thousand, two hundred twenty-one".