21301211203 has 4 divisors (see below), whose sum is σ = 21301549360. Its totient is φ = 21300873048.

The previous prime is 21301211179. The next prime is 21301211249. The reversal of 21301211203 is 30211210312.

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 21301211203 - 2⁵ = 21301211171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301211303) 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 in 3 ways as a sum of consecutive naturals, for example, 43500 + ... + 210937.

It is an arithmetic number, because the mean of its divisors is an integer number (5325387340).

Almost surely, 2^21301211203 is an apocalyptic number.

21301211203 is a deficient number, since it is larger than the sum of its proper divisors (338157).

21301211203 is an equidigital number, since it uses as much as digits as its factorization.

21301211203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338156.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21301211203 its reverse (30211210312), we get a palindrome (51512421515).

The spelling of 21301211203 in words is "twenty-one billion, three hundred one million, two hundred eleven thousand, two hundred three".