1001100103 has 4 divisors (see below), whose sum is σ = 1001919888. Its totient is φ = 1000280320.

The previous prime is 1001100091. The next prime is 1001100127. The reversal of 1001100103 is 3010011001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3010011001 = 4519 ⋅666079.

It is a cyclic number.

It is not a de Polignac number, because 1001100103 - 2⁹ = 1001099591 is a prime.

It is a super-2 number, since 2×1001100103² = 2004402832453221218, 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 (2001100103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408058 + ... + 410503.

It is an arithmetic number, because the mean of its divisors is an integer number (250479972).

Almost surely, 2^1001100103 is an apocalyptic number.

1001100103 is a deficient number, since it is larger than the sum of its proper divisors (819785).

1001100103 is an equidigital number, since it uses as much as digits as its factorization.

1001100103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819784.

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

The square root of 1001100103 is about 31640.1659761765. The cubic root of 1001100103 is about 1000.3665666125.

Adding to 1001100103 its reverse (3010011001), we get a palindrome (4011111104).

The spelling of 1001100103 in words is "one billion, one million, one hundred thousand, one hundred three".