100221211 has 2 divisors, whose sum is σ = 100221212. Its totient is φ = 100221210.

The previous prime is 100221193. The next prime is 100221221. The reversal of 100221211 is 112122001.

It is an a-pointer prime, because the next prime (100221221) can be obtained adding 100221211 to its sum of digits (10).

It is a strong prime.

It is an emirp because it is prime and its reverse (112122001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100221211 - 2⁷ = 100221083 is a prime.

It is a super-2 number, since 2×100221211² = 20088582268613042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100221221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110605 + 50110606.

It is an arithmetic number, because the mean of its divisors is an integer number (50110606).

Almost surely, 2^100221211 is an apocalyptic number.

100221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221211 is an equidigital number, since it uses as much as digits as its factorization.

100221211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 100221211 is about 10011.0544399678. The cubic root of 100221211 is about 464.5008881369.

Adding to 100221211 its reverse (112122001), we get a palindrome (212343212).

The spelling of 100221211 in words is "one hundred million, two hundred twenty-one thousand, two hundred eleven".