100242121 has 16 divisors (see below), whose sum is σ = 117089280. Its totient is φ = 84042000.

The previous prime is 100242113. The next prime is 100242143. The reversal of 100242121 is 121242001.

It is a happy number.

It is not a de Polignac number, because 100242121 - 2³ = 100242113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100242101) 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, 103180 + ... + 104146.

It is an arithmetic number, because the mean of its divisors is an integer number (7318080).

Almost surely, 2^100242121 is an apocalyptic number.

It is an amenable number.

100242121 is a deficient number, since it is larger than the sum of its proper divisors (16847159).

100242121 is an equidigital number, since it uses as much as digits as its factorization.

100242121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100242121 is about 10012.0987310354. The cubic root of 100242121 is about 464.5331901418.

Adding to 100242121 its reverse (121242001), we get a palindrome (221484122).

The spelling of 100242121 in words is "one hundred million, two hundred forty-two thousand, one hundred twenty-one".