21133132265 has 8 divisors (see below), whose sum is σ = 28982581440. Its totient is φ = 14491290672.

The previous prime is 21133132249. The next prime is 21133132277. The reversal of 21133132265 is 56223133112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21133132265 - 2⁴ = 21133132249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301901855 + ... + 301901924.

It is an arithmetic number, because the mean of its divisors is an integer number (3622822680).

Almost surely, 2^21133132265 is an apocalyptic number.

It is an amenable number.

21133132265 is a deficient number, since it is larger than the sum of its proper divisors (7849449175).

21133132265 is an equidigital number, since it uses as much as digits as its factorization.

21133132265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603803791.

The product of its digits is 6480, while the sum is 29.

Adding to 21133132265 its reverse (56223133112), we get a palindrome (77356265377).

The spelling of 21133132265 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-two thousand, two hundred sixty-five".