21301132233 has 4 divisors (see below), whose sum is σ = 28401509648. Its totient is φ = 14200754820.

The previous prime is 21301132219. The next prime is 21301132241. The reversal of 21301132233 is 33223110312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21301132233 - 2⁴ = 21301132217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301132283) 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, 3550188703 + ... + 3550188708.

It is an arithmetic number, because the mean of its divisors is an integer number (7100377412).

Almost surely, 2^21301132233 is an apocalyptic number.

It is an amenable number.

21301132233 is a deficient number, since it is larger than the sum of its proper divisors (7100377415).

21301132233 is an equidigital number, since it uses as much as digits as its factorization.

21301132233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100377414.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21301132233 its reverse (33223110312), we get a palindrome (54524242545).

The spelling of 21301132233 in words is "twenty-one billion, three hundred one million, one hundred thirty-two thousand, two hundred thirty-three".