21313220311343 has 2 divisors, whose sum is σ = 21313220311344. Its totient is φ = 21313220311342.

The previous prime is 21313220311333. The next prime is 21313220311363. The reversal of 21313220311343 is 34311302231312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313220311343 - 2⁸ = 21313220311087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313220311333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656610155671 + 10656610155672.

It is an arithmetic number, because the mean of its divisors is an integer number (10656610155672).

Almost surely, 2^{21313220311343} is an apocalyptic number.

21313220311343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313220311343 is an equidigital number, since it uses as much as digits as its factorization.

21313220311343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 21313220311343 its reverse (34311302231312), we get a palindrome (55624522542655).

The spelling of 21313220311343 in words is "twenty-one trillion, three hundred thirteen billion, two hundred twenty million, three hundred eleven thousand, three hundred forty-three".