21241101223 has 2 divisors, whose sum is σ = 21241101224. Its totient is φ = 21241101222.

The previous prime is 21241101179. The next prime is 21241101269. The reversal of 21241101223 is 32210114212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21241101223 - 2¹⁷ = 21240970151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21241101223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21271101223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620550611 + 10620550612.

It is an arithmetic number, because the mean of its divisors is an integer number (10620550612).

Almost surely, 2^21241101223 is an apocalyptic number.

21241101223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241101223 is an equidigital number, since it uses as much as digits as its factorization.

21241101223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21241101223 its reverse (32210114212), we get a palindrome (53451215435).

The spelling of 21241101223 in words is "twenty-one billion, two hundred forty-one million, one hundred one thousand, two hundred twenty-three".