21311340241333 has 4 divisors (see below), whose sum is σ = 21318862778668. Its totient is φ = 21303817704000.

The previous prime is 21311340241327. The next prime is 21311340241357. The reversal of 21311340241333 is 33314204311312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4285467198769 + 17025873042564 = 2070137^2 + 4126242^2 .

It is a cyclic number.

It is not a de Polignac number, because 21311340241333 - 2²⁹ = 21310803370421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21311340241295 and 21311340241304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311340241393) 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, 3761264418 + ... + 3761270083.

It is an arithmetic number, because the mean of its divisors is an integer number (5329715694667).

Almost surely, 2^{21311340241333} is an apocalyptic number.

It is an amenable number.

21311340241333 is a deficient number, since it is larger than the sum of its proper divisors (7522537335).

21311340241333 is an equidigital number, since it uses as much as digits as its factorization.

21311340241333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7522537334.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 21311340241333 its reverse (33314204311312), we get a palindrome (54625544552645).

The spelling of 21311340241333 in words is "twenty-one trillion, three hundred eleven billion, three hundred forty million, two hundred forty-one thousand, three hundred thirty-three".