21201302233 has 8 divisors (see below), whose sum is σ = 21267981000. Its totient is φ = 21134658048.

The previous prime is 21201302197. The next prime is 21201302267. The reversal of 21201302233 is 33220310212.

It can be written as a sum of positive squares in 4 ways, for example, as 1541897289 + 19659404944 = 39267^2 + 140212^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21201302233 - 2¹⁷ = 21201171161 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 21201302233.

It is not an unprimeable number, because it can be changed into a prime (21201302833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1792503 + ... + 1804291.

It is an arithmetic number, because the mean of its divisors is an integer number (2658497625).

Almost surely, 2^21201302233 is an apocalyptic number.

It is an amenable number.

21201302233 is a deficient number, since it is larger than the sum of its proper divisors (66678767).

21201302233 is a wasteful number, since it uses less digits than its factorization.

21201302233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21201302233 its reverse (33220310212), we get a palindrome (54421612445).

The spelling of 21201302233 in words is "twenty-one billion, two hundred one million, three hundred two thousand, two hundred thirty-three".