21201212200303 has 32 divisors (see below), whose sum is σ = 21533516928000. Its totient is φ = 20872337888640.

The previous prime is 21201212200297. The next prime is 21201212200451. The reversal of 21201212200303 is 30300221210212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201212200303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201212200703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19117413513 + ... + 19117414621.

It is an arithmetic number, because the mean of its divisors is an integer number (672922404000).

Almost surely, 2^{21201212200303} is an apocalyptic number.

21201212200303 is a deficient number, since it is larger than the sum of its proper divisors (332304727697).

21201212200303 is a wasteful number, since it uses less digits than its factorization.

21201212200303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21201212200303 its reverse (30300221210212), we get a palindrome (51501433410515).

Subtracting 21201212200303 from its reverse (30300221210212), we obtain a palindrome (9099009009909).

The spelling of 21201212200303 in words is "twenty-one trillion, two hundred one billion, two hundred twelve million, two hundred thousand, three hundred three".