100521003 has 32 divisors (see below), whose sum is σ = 152635392. Its totient is φ = 58291200.

The previous prime is 100520993. The next prime is 100521007. The reversal of 100521003 is 300125001.

It is not a de Polignac number, because 100521003 - 2⁶ = 100520939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100521003.

It is not an unprimeable number, because it can be changed into a prime (100521007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98725 + ... + 99737.

It is an arithmetic number, because the mean of its divisors is an integer number (4769856).

Almost surely, 2^100521003 is an apocalyptic number.

100521003 is a deficient number, since it is larger than the sum of its proper divisors (52114389).

100521003 is a wasteful number, since it uses less digits than its factorization.

100521003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 100521003 is about 10026.0163075870. The cubic root of 100521003 is about 464.9635813772.

Adding to 100521003 its reverse (300125001), we get a palindrome (400646004).

The spelling of 100521003 in words is "one hundred million, five hundred twenty-one thousand, three".