100212221 has 8 divisors (see below), whose sum is σ = 101035200. Its totient is φ = 99392832.

The previous prime is 100212163. The next prime is 100212223. The reversal of 100212221 is 122212001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100212221 - 2⁶ = 100212157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212223) 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 7 ways as a sum of consecutive naturals, for example, 85586 + ... + 86748.

It is an arithmetic number, because the mean of its divisors is an integer number (12629400).

Almost surely, 2^100212221 is an apocalyptic number.

It is an amenable number.

100212221 is a deficient number, since it is larger than the sum of its proper divisors (822979).

100212221 is a wasteful number, since it uses less digits than its factorization.

100212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 100212221 is about 10010.6054262467. The cubic root of 100212221 is about 464.4869989019.

Adding to 100212221 its reverse (122212001), we get a palindrome (222424222).

The spelling of 100212221 in words is "one hundred million, two hundred twelve thousand, two hundred twenty-one".