100066221 has 12 divisors (see below), whose sum is σ = 145679872. Its totient is φ = 66184776.

The previous prime is 100066207. The next prime is 100066231. The reversal of 100066221 is 122660001.

It is a happy number.

100066221 is a `hidden beast` number, since 1 + 0 + 0 + 0 + 662 + 2 + 1 = 666.

It is not a de Polignac number, because 100066221 - 2⁶ = 100066157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100066194 and 100066203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100066231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42631 + ... + 44916.

Almost surely, 2^100066221 is an apocalyptic number.

It is an amenable number.

100066221 is a deficient number, since it is larger than the sum of its proper divisors (45613651).

100066221 is a wasteful number, since it uses less digits than its factorization.

100066221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87680 (or 87677 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 100066221 is about 10003.3105020288. The cubic root of 100066221 is about 464.2613176383.

The spelling of 100066221 in words is "one hundred million, sixty-six thousand, two hundred twenty-one".