21233211223 has 24 divisors (see below), whose sum is σ = 24893356320. Its totient is φ = 17739321600.

The previous prime is 21233211199. The next prime is 21233211247. The reversal of 21233211223 is 32211233212.

It is an interprime number because it is at equal distance from previous prime (21233211199) and next prime (21233211247).

It is not a de Polignac number, because 21233211223 - 2¹⁷ = 21233080151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21233211194 and 21233211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233211253) 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 23 ways as a sum of consecutive naturals, for example, 3137163 + ... + 3143923.

It is an arithmetic number, because the mean of its divisors is an integer number (1037223180).

Almost surely, 2^21233211223 is an apocalyptic number.

21233211223 is a deficient number, since it is larger than the sum of its proper divisors (3660145097).

21233211223 is an frugal number, since it uses more digits than its factorization.

21233211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999 (or 6928 counting only the distinct ones).

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

Adding to 21233211223 its reverse (32211233212), we get a palindrome (53444444435).

The spelling of 21233211223 in words is "twenty-one billion, two hundred thirty-three million, two hundred eleven thousand, two hundred twenty-three".