21133132223 has 32 divisors (see below), whose sum is σ = 25907481600. Its totient is φ = 16837030656.

The previous prime is 21133132219. The next prime is 21133132249. The reversal of 21133132223 is 32223133112.

It is a cyclic number.

It is not a de Polignac number, because 21133132223 - 2² = 21133132219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133182223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1486115 + ... + 1500267.

It is an arithmetic number, because the mean of its divisors is an integer number (809608800).

Almost surely, 2^21133132223 is an apocalyptic number.

21133132223 is a deficient number, since it is larger than the sum of its proper divisors (4774349377).

21133132223 is a wasteful number, since it uses less digits than its factorization.

21133132223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14391.

The product of its digits is 1296, while the sum is 23.

Adding to 21133132223 its reverse (32223133112), we get a palindrome (53356265335).

The spelling of 21133132223 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-two thousand, two hundred twenty-three".