2100400203 has 16 divisors (see below), whose sum is σ = 3055910400. Its totient is φ = 1272643680.

The previous prime is 2100400199. The next prime is 2100400259. The reversal of 2100400203 is 3020040012.

It is not a de Polignac number, because 2100400203 - 2² = 2100400199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100400283) 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, 208558 + ... + 218396.

It is an arithmetic number, because the mean of its divisors is an integer number (190994400).

Almost surely, 2^2100400203 is an apocalyptic number.

2100400203 is a deficient number, since it is larger than the sum of its proper divisors (955510197).

2100400203 is a wasteful number, since it uses less digits than its factorization.

2100400203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16322.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2100400203 is about 45830.1233142570. The cubic root of 2100400203 is about 1280.6605076972.

Adding to 2100400203 its reverse (3020040012), we get a palindrome (5120440215).

The spelling of 2100400203 in words is "two billion, one hundred million, four hundred thousand, two hundred three".