21333222211321 has 4 divisors (see below), whose sum is σ = 21333246762100. Its totient is φ = 21333197660544.

The previous prime is 21333222211309. The next prime is 21333222211391. The reversal of 21333222211321 is 12311222233312.

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 2180879168400 + 19152343042921 = 1476780^2 + 4376339^2 .

It is a cyclic number.

It is not a de Polignac number, because 21333222211321 - 2¹³ = 21333222203129 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 21333222211321.

It is not an unprimeable number, because it can be changed into a prime (21333222211391) 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, 10922256 + ... + 12726433.

It is an arithmetic number, because the mean of its divisors is an integer number (5333311690525).

Almost surely, 2^{21333222211321} is an apocalyptic number.

It is an amenable number.

21333222211321 is a deficient number, since it is larger than the sum of its proper divisors (24550779).

21333222211321 is an equidigital number, since it uses as much as digits as its factorization.

21333222211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24550778.

The product of its digits is 5184, while the sum is 28.

Adding to 21333222211321 its reverse (12311222233312), we get a palindrome (33644444444633).

The spelling of 21333222211321 in words is "twenty-one trillion, three hundred thirty-three billion, two hundred twenty-two million, two hundred eleven thousand, three hundred twenty-one".