21230233223 has 4 divisors (see below), whose sum is σ = 21915079488. Its totient is φ = 20545386960.

The previous prime is 21230233201. The next prime is 21230233231. The reversal of 21230233223 is 32233203212.

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

It is a cyclic number.

It is not a de Polignac number, because 21230233223 - 2⁸ = 21230232967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230232223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342423086 + ... + 342423147.

It is an arithmetic number, because the mean of its divisors is an integer number (5478769872).

Almost surely, 2^21230233223 is an apocalyptic number.

21230233223 is a deficient number, since it is larger than the sum of its proper divisors (684846265).

21230233223 is an equidigital number, since it uses as much as digits as its factorization.

21230233223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684846264.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21230233223 its reverse (32233203212), we get a palindrome (53463436435).

The spelling of 21230233223 in words is "twenty-one billion, two hundred thirty million, two hundred thirty-three thousand, two hundred twenty-three".