100221193 has 2 divisors, whose sum is σ = 100221194. Its totient is φ = 100221192.

The previous prime is 100221139. The next prime is 100221211. The reversal of 100221193 is 391122001.

Together with previous prime (100221139) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72795024 + 27426169 = 8532^2 + 5237^2 .

It is a cyclic number.

It is not a de Polignac number, because 100221193 - 2¹⁷ = 100090121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100221193.

It is not a weakly prime, because it can be changed into another prime (100221133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110596 + 50110597.

It is an arithmetic number, because the mean of its divisors is an integer number (50110597).

Almost surely, 2^100221193 is an apocalyptic number.

It is an amenable number.

100221193 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221193 is an equidigital number, since it uses as much as digits as its factorization.

100221193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 100221193 is about 10011.0535409616. The cubic root of 100221193 is about 464.5008603283.

Adding to 100221193 its reverse (391122001), we get a palindrome (491343194).

The spelling of 100221193 in words is "one hundred million, two hundred twenty-one thousand, one hundred ninety-three".