21302322133 has 4 divisors (see below), whose sum is σ = 21302616268. Its totient is φ = 21302028000.

The previous prime is 21302322127. The next prime is 21302322143. The reversal of 21302322133 is 33122320312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4072609489 + 17229712644 = 63817^2 + 131262^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302322133 - 2¹⁷ = 21302191061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302322143) 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, 46435 + ... + 211567.

It is an arithmetic number, because the mean of its divisors is an integer number (5325654067).

Almost surely, 2^21302322133 is an apocalyptic number.

It is an amenable number.

21302322133 is a deficient number, since it is larger than the sum of its proper divisors (294135).

21302322133 is a wasteful number, since it uses less digits than its factorization.

21302322133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294134.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21302322133 its reverse (33122320312), we get a palindrome (54424642445).

The spelling of 21302322133 in words is "twenty-one billion, three hundred two million, three hundred twenty-two thousand, one hundred thirty-three".