21244123103 has 8 divisors (see below), whose sum is σ = 24308941440. Its totient is φ = 18186790680.

The previous prime is 21244123051. The next prime is 21244123111. The reversal of 21244123103 is 30132144212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21244123103 - 2⁸ = 21244122847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244123133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1865393 + ... + 1876746.

It is an arithmetic number, because the mean of its divisors is an integer number (3038617680).

Almost surely, 2^21244123103 is an apocalyptic number.

21244123103 is a deficient number, since it is larger than the sum of its proper divisors (3064818337).

21244123103 is an equidigital number, since it uses as much as digits as its factorization.

21244123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742957.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21244123103 its reverse (30132144212), we get a palindrome (51376267315).

The spelling of 21244123103 in words is "twenty-one billion, two hundred forty-four million, one hundred twenty-three thousand, one hundred three".