1100100103 has 4 divisors (see below), whose sum is σ = 1100179080. Its totient is φ = 1100021128.

The previous prime is 1100100091. The next prime is 1100100121. The reversal of 1100100103 is 3010010011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3010010011 = 359 ⋅8384429.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100100103 is a prime.

It is a super-2 number, since 2×1100100103² = 2420440473241221218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100500103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12400 + ... + 48517.

It is an arithmetic number, because the mean of its divisors is an integer number (275044770).

Almost surely, 2^1100100103 is an apocalyptic number.

1100100103 is a deficient number, since it is larger than the sum of its proper divisors (78977).

1100100103 is an equidigital number, since it uses as much as digits as its factorization.

1100100103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78976.

The product of its (nonzero) digits is 3, while the sum is 7.

The square root of 1100100103 is about 33167.7569787286. The cubic root of 1100100103 is about 1032.3114279418.

Adding to 1100100103 its reverse (3010010011), we get a palindrome (4110110114).

The spelling of 1100100103 in words is "one billion, one hundred million, one hundred thousand, one hundred three".