21303543201 has 16 divisors (see below), whose sum is σ = 29425387008. Its totient is φ = 13695292800.

The previous prime is 21303543199. The next prime is 21303543211. The reversal of 21303543201 is 10234530312.

It is not a de Polignac number, because 21303543201 - 2¹ = 21303543199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21303543211) 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 15 ways as a sum of consecutive naturals, for example, 381466 + ... + 433731.

It is an arithmetic number, because the mean of its divisors is an integer number (1839086688).

Almost surely, 2^21303543201 is an apocalyptic number.

It is an amenable number.

21303543201 is a deficient number, since it is larger than the sum of its proper divisors (8121843807).

21303543201 is a wasteful number, since it uses less digits than its factorization.

21303543201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815512.

The product of its (nonzero) digits is 2160, while the sum is 24.

The spelling of 21303543201 in words is "twenty-one billion, three hundred three million, five hundred forty-three thousand, two hundred one".