2102001003 has 16 divisors (see below), whose sum is σ = 3138600960. Its totient is φ = 1390297608.

The previous prime is 2102000933. The next prime is 2102001007. The reversal of 2102001003 is 3001002012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2102001003 is a prime.

It is a super-2 number, since 2×2102001003² = 8836816433226012018, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2102001007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303075 + ... + 309932.

It is an arithmetic number, because the mean of its divisors is an integer number (196162560).

Almost surely, 2^2102001003 is an apocalyptic number.

2102001003 is a deficient number, since it is larger than the sum of its proper divisors (1036599957).

2102001003 is a wasteful number, since it uses less digits than its factorization.

2102001003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613143 (or 613137 counting only the distinct ones).

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

The square root of 2102001003 is about 45847.5844838090. The cubic root of 2102001003 is about 1280.9857728128.

Adding to 2102001003 its reverse (3001002012), we get a palindrome (5103003015).

The spelling of 2102001003 in words is "two billion, one hundred two million, one thousand, three".