21112120221343 has 2 divisors, whose sum is σ = 21112120221344. Its totient is φ = 21112120221342.

The previous prime is 21112120221329. The next prime is 21112120221359. The reversal of 21112120221343 is 34312202121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112120221343 - 2²⁵ = 21112086666911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112120221943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556060110671 + 10556060110672.

It is an arithmetic number, because the mean of its divisors is an integer number (10556060110672).

Almost surely, 2^{21112120221343} is an apocalyptic number.

21112120221343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112120221343 is an equidigital number, since it uses as much as digits as its factorization.

21112120221343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21112120221343 its reverse (34312202121112), we get a palindrome (55424322342455).

The spelling of 21112120221343 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, two hundred twenty-one thousand, three hundred forty-three".