100203504321 has 16 divisors (see below), whose sum is σ = 136606585536. Its totient is φ = 65310288576.

The previous prime is 100203504299. The next prime is 100203504341. The reversal of 100203504321 is 123405302001.

It is a de Polignac number, because none of the positive numbers 2^k-100203504321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100203504341) 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, 1068450 + ... + 1158443.

It is an arithmetic number, because the mean of its divisors is an integer number (8537911596).

Almost surely, 2^100203504321 is an apocalyptic number.

It is an amenable number.

100203504321 is a deficient number, since it is larger than the sum of its proper divisors (36403081215).

100203504321 is a wasteful number, since it uses less digits than its factorization.

100203504321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227232.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 100203504321 its reverse (123405302001), we get a palindrome (223608806322).

The spelling of 100203504321 in words is "one hundred billion, two hundred three million, five hundred four thousand, three hundred twenty-one".