21230301233 has 4 divisors (see below), whose sum is σ = 22479142500. Its totient is φ = 19981459968.

The previous prime is 21230301227. The next prime is 21230301247. The reversal of 21230301233 is 33210303212.

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 16645386289 + 4584914944 = 129017^2 + 67712^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230301233 - 2⁸ = 21230300977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21230301223) 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, 624420608 + ... + 624420641.

It is an arithmetic number, because the mean of its divisors is an integer number (5619785625).

Almost surely, 2^21230301233 is an apocalyptic number.

It is an amenable number.

21230301233 is a deficient number, since it is larger than the sum of its proper divisors (1248841267).

21230301233 is a wasteful number, since it uses less digits than its factorization.

21230301233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248841266.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21230301233 its reverse (33210303212), we get a palindrome (54440604445).

The spelling of 21230301233 in words is "twenty-one billion, two hundred thirty million, three hundred one thousand, two hundred thirty-three".