1011100203 has 6 divisors (see below), whose sum is σ = 1460478084. Its totient is φ = 674066796.

The previous prime is 1011100199. The next prime is 1011100229. The reversal of 1011100203 is 3020011101.

It is not a de Polignac number, because 1011100203 - 2² = 1011100199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 112344467 = 1011100203 / (1 + 0 + 1 + 1 + 1 + 0 + 0 + 2 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (1011100243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56172225 + ... + 56172242.

It is an arithmetic number, because the mean of its divisors is an integer number (243413014).

Almost surely, 2^1011100203 is an apocalyptic number.

1011100203 is a deficient number, since it is larger than the sum of its proper divisors (449377881).

1011100203 is a wasteful number, since it uses less digits than its factorization.

1011100203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112344473 (or 112344470 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1011100203 is about 31797.8018579901. The cubic root of 1011100203 is about 1003.6864609725.

Adding to 1011100203 its reverse (3020011101), we get a palindrome (4031111304).

The spelling of 1011100203 in words is "one billion, eleven million, one hundred thousand, two hundred three".