2021020003 has 2 divisors, whose sum is σ = 2021020004. Its totient is φ = 2021020002.

The previous prime is 2021019997. The next prime is 2021020007. The reversal of 2021020003 is 3000201202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021020003 - 2⁹ = 2021019491 is a prime.

It is a super-2 number, since 2×2021020003² = 8169043705052240018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021020007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010510001 + 1010510002.

It is an arithmetic number, because the mean of its divisors is an integer number (1010510002).

Almost surely, 2^2021020003 is an apocalyptic number.

2021020003 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021020003 is an equidigital number, since it uses as much as digits as its factorization.

2021020003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2021020003 is about 44955.7560608205. The cubic root of 2021020003 is about 1264.3196001485.

Adding to 2021020003 its reverse (3000201202), we get a palindrome (5021221205).

The spelling of 2021020003 in words is "two billion, twenty-one million, twenty thousand, three".