21313001133 has 24 divisors (see below), whose sum is σ = 32656074048. Its totient is φ = 13348363392.

The previous prime is 21313001111. The next prime is 21313001159. The reversal of 21313001133 is 33110031312.

It is a happy number.

It is not a de Polignac number, because 21313001133 - 2¹⁸ = 21312738989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313001033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43641 + ... + 211022.

It is an arithmetic number, because the mean of its divisors is an integer number (1360669752).

Almost surely, 2^21313001133 is an apocalyptic number.

It is an amenable number.

21313001133 is a deficient number, since it is larger than the sum of its proper divisors (11343072915).

21313001133 is a wasteful number, since it uses less digits than its factorization.

21313001133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255233 (or 255230 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21313001133 its reverse (33110031312), we get a palindrome (54423032445).

The spelling of 21313001133 in words is "twenty-one billion, three hundred thirteen million, one thousand, one hundred thirty-three".