21303001233 has 6 divisors (see below), whose sum is σ = 30771001794. Its totient is φ = 14202000816.

The previous prime is 21303001211. The next prime is 21303001249. The reversal of 21303001233 is 33210030312.

21303001233 is a `hidden beast` number, since 2 + 130 + 300 + 1 + 233 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19313216784 + 1989784449 = 138972^2 + 44607^2 .

It is not a de Polignac number, because 21303001233 - 2⁶ = 21303001169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21303001253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1183500060 + ... + 1183500077.

It is an arithmetic number, because the mean of its divisors is an integer number (5128500299).

Almost surely, 2^21303001233 is an apocalyptic number.

It is an amenable number.

21303001233 is a deficient number, since it is larger than the sum of its proper divisors (9468000561).

21303001233 is a wasteful number, since it uses less digits than its factorization.

21303001233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367000143 (or 2367000140 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21303001233 its reverse (33210030312), we get a palindrome (54513031545).

The spelling of 21303001233 in words is "twenty-one billion, three hundred three million, one thousand, two hundred thirty-three".