100021000203 has 40 divisors (see below), whose sum is σ = 154638348480. Its totient is φ = 64351324800.

The previous prime is 100021000193. The next prime is 100021000223. The reversal of 100021000203 is 302000120001.

It is a happy number.

It is not a de Polignac number, because 100021000203 - 2⁵ = 100021000171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (100021000223) 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 39 ways as a sum of consecutive naturals, for example, 5739303 + ... + 5756703.

It is an arithmetic number, because the mean of its divisors is an integer number (3865958712).

Almost surely, 2^100021000203 is an apocalyptic number.

100021000203 is a deficient number, since it is larger than the sum of its proper divisors (54617348277).

100021000203 is a wasteful number, since it uses less digits than its factorization.

100021000203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19889 (or 19880 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 100021000203 its reverse (302000120001), we get a palindrome (402021120204).

The spelling of 100021000203 in words is "one hundred billion, twenty-one million, two hundred three", and thus it is an aban number.