21112330223 has 12 divisors (see below), whose sum is σ = 22831224360. Its totient is φ = 19498029936.

The previous prime is 21112330201. The next prime is 21112330229. The reversal of 21112330223 is 32203321112.

It is a de Polignac number, because none of the positive numbers 2^k-21112330223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112330195 and 21112330204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112330229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672761 + ... + 703442.

It is an arithmetic number, because the mean of its divisors is an integer number (1902602030).

Almost surely, 2^21112330223 is an apocalyptic number.

21112330223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21112330223 is a deficient number, since it is larger than the sum of its proper divisors (1718894137).

21112330223 is a wasteful number, since it uses less digits than its factorization.

21112330223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376278 (or 1376255 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21112330223 its reverse (32203321112), we get a palindrome (53315651335).

The spelling of 21112330223 in words is "twenty-one billion, one hundred twelve million, three hundred thirty thousand, two hundred twenty-three".