2021010003 has 6 divisors (see below), whose sum is σ = 2919236684. Its totient is φ = 1347339996.

The previous prime is 2021009999. The next prime is 2021010053. The reversal of 2021010003 is 3000101202.

It is a happy number.

It is not a de Polignac number, because 2021010003 - 2² = 2021009999 is a prime.

It is a super-3 number, since 3×2021010003³ (a number of 29 digits) contains 333 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: 224556667 = 2021010003 / (2 + 0 + 2 + 1 + 0 + 1 + 0 + 0 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021010053) 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, 112278325 + ... + 112278342.

Almost surely, 2^2021010003 is an apocalyptic number.

2021010003 is a deficient number, since it is larger than the sum of its proper divisors (898226681).

2021010003 is a wasteful number, since it uses less digits than its factorization.

2021010003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224556673 (or 224556670 counting only the distinct ones).

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

The square root of 2021010003 is about 44955.6448402200. The cubic root of 2021010003 is about 1264.3175148620.

Adding to 2021010003 its reverse (3000101202), we get a palindrome (5021111205).

The spelling of 2021010003 in words is "two billion, twenty-one million, ten thousand, three".