2001020103 has 6 divisors (see below), whose sum is σ = 2890362384. Its totient is φ = 1334013396.

The previous prime is 2001020101. The next prime is 2001020117. The reversal of 2001020103 is 3010201002.

It is a happy number.

It is not a de Polignac number, because 2001020103 - 2¹ = 2001020101 is a prime.

It is a super-2 number, since 2×2001020103² = 8008162905220261218, which contains 22 as substring.

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: 222335567 = 2001020103 / (2 + 0 + 0 + 1 + 0 + 2 + 0 + 1 + 0 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001020101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111167775 + ... + 111167792.

It is an arithmetic number, because the mean of its divisors is an integer number (481727064).

Almost surely, 2^2001020103 is an apocalyptic number.

2001020103 is a deficient number, since it is larger than the sum of its proper divisors (889342281).

2001020103 is a wasteful number, since it uses less digits than its factorization.

2001020103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222335573 (or 222335570 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2001020103 is about 44732.7631943299. The cubic root of 2001020103 is about 1260.1352216932.

Adding to 2001020103 its reverse (3010201002), we get a palindrome (5011221105).

The spelling of 2001020103 in words is "two billion, one million, twenty thousand, one hundred three".