21103312333223 has 16 divisors (see below), whose sum is σ = 23640114215520. Its totient is φ = 18721060033536.

The previous prime is 21103312333211. The next prime is 21103312333241. The reversal of 21103312333223 is 32233321330112.

It is a cyclic number.

It is not a de Polignac number, because 21103312333223 - 2⁸ = 21103312332967 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 (21103312333273) 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, 165762086 + ... + 165889347.

It is an arithmetic number, because the mean of its divisors is an integer number (1477507138470).

Almost surely, 2^{21103312333223} is an apocalyptic number.

21103312333223 is a deficient number, since it is larger than the sum of its proper divisors (2536801882297).

21103312333223 is a wasteful number, since it uses less digits than its factorization.

21103312333223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331651666.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21103312333223 its reverse (32233321330112), we get a palindrome (53336633663335).

The spelling of 21103312333223 in words is "twenty-one trillion, one hundred three billion, three hundred twelve million, three hundred thirty-three thousand, two hundred twenty-three".