22221210100221 has 24 divisors (see below), whose sum is σ = 35071807686240. Its totient is φ = 13445643319200.

The previous prime is 22221210100213. The next prime is 22221210100223. The reversal of 22221210100221 is 12200101212222.

It is a happy number.

22221210100221 is a `hidden beast` number, since 2 + 2 + 221 + 210 + 10 + 0 + 221 = 666.

It is not a de Polignac number, because 22221210100221 - 2³ = 22221210100213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22221210100194 and 22221210100203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221210100223) 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, 181244590 + ... + 181367151.

It is an arithmetic number, because the mean of its divisors is an integer number (1461325320260).

Almost surely, 2^{22221210100221} is an apocalyptic number.

It is an amenable number.

22221210100221 is a deficient number, since it is larger than the sum of its proper divisors (12850597586019).

22221210100221 is a wasteful number, since it uses less digits than its factorization.

22221210100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362612377 (or 362612374 counting only the distinct ones).

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

Adding to 22221210100221 its reverse (12200101212222), we get a palindrome (34421311312443).

The spelling of 22221210100221 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred ten million, one hundred thousand, two hundred twenty-one".