21330113201 has 4 divisors (see below), whose sum is σ = 21330447732. Its totient is φ = 21329778672.

The previous prime is 21330113173. The next prime is 21330113219. The reversal of 21330113201 is 10231103312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18982226176 + 2347887025 = 137776^2 + 48455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330113201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21330113201.

It is not an unprimeable number, because it can be changed into a prime (21330113261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38666 + ... + 210131.

It is an arithmetic number, because the mean of its divisors is an integer number (5332611933).

Almost surely, 2^21330113201 is an apocalyptic number.

It is an amenable number.

21330113201 is a deficient number, since it is larger than the sum of its proper divisors (334531).

21330113201 is an equidigital number, since it uses as much as digits as its factorization.

21330113201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334530.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21330113201 its reverse (10231103312), we get a palindrome (31561216513).

The spelling of 21330113201 in words is "twenty-one billion, three hundred thirty million, one hundred thirteen thousand, two hundred one".