100221253 has 4 divisors (see below), whose sum is σ = 109332288. Its totient is φ = 91110220.

The previous prime is 100221227. The next prime is 100221259. The reversal of 100221253 is 352122001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100221253 - 2⁵ = 100221221 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 (100221259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4555501 + ... + 4555522.

It is an arithmetic number, because the mean of its divisors is an integer number (27333072).

Almost surely, 2^100221253 is an apocalyptic number.

It is an amenable number.

100221253 is a deficient number, since it is larger than the sum of its proper divisors (9111035).

100221253 is an equidigital number, since it uses as much as digits as its factorization.

100221253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111034.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 100221253 is about 10011.0565376488. The cubic root of 100221253 is about 464.5009530235.

Adding to 100221253 its reverse (352122001), we get a palindrome (452343254).

It can be divided in two parts, 10022 and 1253, that multiplied together give a triangular number (12557566 = T₅₀₁₁).

The spelling of 100221253 in words is "one hundred million, two hundred twenty-one thousand, two hundred fifty-three".