21332112223 has 4 divisors (see below), whose sum is σ = 21602139040. Its totient is φ = 21062085408.

The previous prime is 21332112209. The next prime is 21332112257. The reversal of 21332112223 is 32221123312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332112223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332112194 and 21332112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332112203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135013290 + ... + 135013447.

It is an arithmetic number, because the mean of its divisors is an integer number (5400534760).

Almost surely, 2^21332112223 is an apocalyptic number.

21332112223 is a deficient number, since it is larger than the sum of its proper divisors (270026817).

21332112223 is an equidigital number, since it uses as much as digits as its factorization.

21332112223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270026816.

The product of its digits is 864, while the sum is 22.

Adding to 21332112223 its reverse (32221123312), we get a palindrome (53553235535).

The spelling of 21332112223 in words is "twenty-one billion, three hundred thirty-two million, one hundred twelve thousand, two hundred twenty-three".