2101020203 has 2 divisors, whose sum is σ = 2101020204. Its totient is φ = 2101020202.

The previous prime is 2101020199. The next prime is 2101020379. The reversal of 2101020203 is 3020201012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101020203 - 2² = 2101020199 is a prime.

It is a super-2 number, since 2×2101020203² = 8828571786828322418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101020403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050510101 + 1050510102.

It is an arithmetic number, because the mean of its divisors is an integer number (1050510102).

Almost surely, 2^2101020203 is an apocalyptic number.

2101020203 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101020203 is an equidigital number, since it uses as much as digits as its factorization.

2101020203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2101020203 is about 45836.8869252701. The cubic root of 2101020203 is about 1280.7865045431.

Adding to 2101020203 its reverse (3020201012), we get a palindrome (5121221215).

The spelling of 2101020203 in words is "two billion, one hundred one million, twenty thousand, two hundred three".