21440230011223 has 16 divisors (see below), whose sum is σ = 22696247423520. Its totient is φ = 20226902846976.

The previous prime is 21440230011197. The next prime is 21440230011229. The reversal of 21440230011223 is 32211003204412.

It is a cyclic number.

It is not a de Polignac number, because 21440230011223 - 2⁹ = 21440230010711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440230011229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48964318 + ... + 49400251.

It is an arithmetic number, because the mean of its divisors is an integer number (1418515463970).

Almost surely, 2^{21440230011223} is an apocalyptic number.

21440230011223 is a deficient number, since it is larger than the sum of its proper divisors (1256017412297).

21440230011223 is a wasteful number, since it uses less digits than its factorization.

21440230011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98364786.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21440230011223 its reverse (32211003204412), we get a palindrome (53651233215635).

The spelling of 21440230011223 in words is "twenty-one trillion, four hundred forty billion, two hundred thirty million, eleven thousand, two hundred twenty-three".