21333000000311 has 4 divisors (see below), whose sum is σ = 21829116279432. Its totient is φ = 20836883721192.

The previous prime is 21333000000233. The next prime is 21333000000317. The reversal of 21333000000311 is 11300000033312.

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

It is a cyclic number.

It is not a de Polignac number, because 21333000000311 - 2²² = 21332995806007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21333000000311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333000000317) 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, 248058139496 + ... + 248058139581.

It is an arithmetic number, because the mean of its divisors is an integer number (5457279069858).

Almost surely, 2^{21333000000311} is an apocalyptic number.

21333000000311 is a deficient number, since it is larger than the sum of its proper divisors (496116279121).

21333000000311 is an equidigital number, since it uses as much as digits as its factorization.

21333000000311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496116279120.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21333000000311 its reverse (11300000033312), we get a palindrome (32633000033623).

The spelling of 21333000000311 in words is "twenty-one trillion, three hundred thirty-three billion, three hundred eleven", and thus it is an aban number.