100321121403 has 22 divisors (see below), whose sum is σ = 150480921204. Its totient is φ = 66880708236.

The previous prime is 100321121389. The next prime is 100321121419. The reversal of 100321121403 is 304121123001.

It is not a de Polignac number, because 100321121403 - 2⁵ = 100321121371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100321121503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 790425 + ... + 908522.

Almost surely, 2^100321121403 is an apocalyptic number.

100321121403 is a deficient number, since it is larger than the sum of its proper divisors (50159799801).

100321121403 is an frugal number, since it uses more digits than its factorization.

100321121403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698977 (or 1698950 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 100321121403 its reverse (304121123001), we get a palindrome (404442244404).

The spelling of 100321121403 in words is "one hundred billion, three hundred twenty-one million, one hundred twenty-one thousand, four hundred three".