100135221 has 16 divisors (see below), whose sum is σ = 136771008. Its totient is φ = 65145600.

The previous prime is 100135181. The next prime is 100135229. The reversal of 100135221 is 122531001.

It is not a de Polignac number, because 100135221 - 2⁷ = 100135093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100135221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100135229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21885 + ... + 26061.

It is an arithmetic number, because the mean of its divisors is an integer number (8548188).

Almost surely, 2^100135221 is an apocalyptic number.

It is an amenable number.

100135221 is a deficient number, since it is larger than the sum of its proper divisors (36635787).

100135221 is a wasteful number, since it uses less digits than its factorization.

100135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 100135221 is about 10006.7587659541. The cubic root of 100135221 is about 464.3680025598.

Adding to 100135221 its reverse (122531001), we get a palindrome (222666222).

The spelling of 100135221 in words is "one hundred million, one hundred thirty-five thousand, two hundred twenty-one".