21344245103 has 2 divisors, whose sum is σ = 21344245104. Its totient is φ = 21344245102.

The previous prime is 21344245073. The next prime is 21344245121. The reversal of 21344245103 is 30154244312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21344245103 - 2²⁸ = 21075809647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344245183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672122551 + 10672122552.

It is an arithmetic number, because the mean of its divisors is an integer number (10672122552).

Almost surely, 2^21344245103 is an apocalyptic number.

21344245103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344245103 is an equidigital number, since it uses as much as digits as its factorization.

21344245103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21344245103 its reverse (30154244312), we get a palindrome (51498489415).

The spelling of 21344245103 in words is "twenty-one billion, three hundred forty-four million, two hundred forty-five thousand, one hundred three".