20100101001003 has 12 divisors (see below), whose sum is σ = 29036811539320. Its totient is φ = 13398529342176.

The previous prime is 20100101000983. The next prime is 20100101001031. The reversal of 20100101001003 is 30010010100102.

It is not a de Polignac number, because 20100101001003 - 2³⁸ = 19825223094059 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100101001103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128083213 + ... + 128240046.

Almost surely, 2^{20100101001003} is an apocalyptic number.

20100101001003 is a deficient number, since it is larger than the sum of its proper divisors (8936710538317).

20100101001003 is a wasteful number, since it uses less digits than its factorization.

20100101001003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256331978 (or 256331975 counting only the distinct ones).

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

Adding to 20100101001003 its reverse (30010010100102), we get a palindrome (50110111101105).

Subtracting 20100101001003 from its reverse (30010010100102), we obtain a palindrome (9909909099099).

The spelling of 20100101001003 in words is "twenty trillion, one hundred billion, one hundred one million, one thousand, three".