21053450201 has 12 divisors (see below), whose sum is σ = 24905849040. Its totient is φ = 17739950760.

The previous prime is 21053450191. The next prime is 21053450237. The reversal of 21053450201 is 10205435012.

It is not a de Polignac number, because 21053450201 - 2³⁰ = 19979708377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21053450261) 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 11 ways as a sum of consecutive naturals, for example, 3638315 + ... + 3644096.

It is an arithmetic number, because the mean of its divisors is an integer number (2075487420).

Almost surely, 2^21053450201 is an apocalyptic number.

It is an amenable number.

21053450201 is a deficient number, since it is larger than the sum of its proper divisors (3852398839).

21053450201 is an equidigital number, since it uses as much as digits as its factorization.

21053450201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282484 (or 7282477 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 21053450201 its reverse (10205435012), we get a palindrome (31258885213).

The spelling of 21053450201 in words is "twenty-one billion, fifty-three million, four hundred fifty thousand, two hundred one".