100121203 has 32 divisors (see below), whose sum is σ = 131532800. Its totient is φ = 73996416.

The previous prime is 100121201. The next prime is 100121213. The reversal of 100121203 is 302121001.

It is not a de Polignac number, because 100121203 - 2¹ = 100121201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100121203.

It is not an unprimeable number, because it can be changed into a prime (100121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136225 + ... + 136957.

It is an arithmetic number, because the mean of its divisors is an integer number (4110400).

Almost surely, 2^100121203 is an apocalyptic number.

100121203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100121203 is a deficient number, since it is larger than the sum of its proper divisors (31411597).

100121203 is a wasteful number, since it uses less digits than its factorization.

100121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 100121203 is about 10006.0583148411. The cubic root of 100121203 is about 464.3463324808.

Adding to 100121203 its reverse (302121001), we get a palindrome (402242204).

The spelling of 100121203 in words is "one hundred million, one hundred twenty-one thousand, two hundred three".