21020201203 has 4 divisors (see below), whose sum is σ = 21041850168. Its totient is φ = 20998552240.

The previous prime is 21020201183. The next prime is 21020201221. The reversal of 21020201203 is 30210202012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21020201203 - 2⁵ = 21020201171 is a prime.

It is a super-2 number, since 2×21020201203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020201233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10823026 + ... + 10824967.

It is an arithmetic number, because the mean of its divisors is an integer number (5260462542).

Almost surely, 2^21020201203 is an apocalyptic number.

21020201203 is a deficient number, since it is larger than the sum of its proper divisors (21648965).

21020201203 is an equidigital number, since it uses as much as digits as its factorization.

21020201203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21648964.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21020201203 its reverse (30210202012), we get a palindrome (51230403215).

The spelling of 21020201203 in words is "twenty-one billion, twenty million, two hundred one thousand, two hundred three".