2100210003 has 6 divisors (see below), whose sum is σ = 3033636684. Its totient is φ = 1400139996.

The previous prime is 2100209989. The next prime is 2100210019. The reversal of 2100210003 is 3000120012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2100210003 is a prime.

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: 233356667 = 2100210003 / (2 + 1 + 0 + 0 + 2 + 1 + 0 + 0 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (2100210403) 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, 116678325 + ... + 116678342.

It is an arithmetic number, because the mean of its divisors is an integer number (505606114).

Almost surely, 2^2100210003 is an apocalyptic number.

2100210003 is a deficient number, since it is larger than the sum of its proper divisors (933426681).

2100210003 is a wasteful number, since it uses less digits than its factorization.

2100210003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233356673 (or 233356670 counting only the distinct ones).

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

The square root of 2100210003 is about 45828.0482128576. The cubic root of 2100210003 is about 1280.6218501466.

Adding to 2100210003 its reverse (3000120012), we get a palindrome (5100330015).

The spelling of 2100210003 in words is "two billion, one hundred million, two hundred ten thousand, three".