21244331223 has 12 divisors (see below), whose sum is σ = 30689947080. Its totient is φ = 14161184016.

The previous prime is 21244331191. The next prime is 21244331233. The reversal of 21244331223 is 32213344212.

21244331223 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 433 + 1 + 223 = 666.

It is not a de Polignac number, because 21244331223 - 2⁵ = 21244331191 is a prime.

It is a super-2 number, since 2×21244331223² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244331233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60513 + ... + 214826.

It is an arithmetic number, because the mean of its divisors is an integer number (2557495590).

Almost surely, 2^21244331223 is an apocalyptic number.

21244331223 is a deficient number, since it is larger than the sum of its proper divisors (9445615857).

21244331223 is a wasteful number, since it uses less digits than its factorization.

21244331223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283918 (or 283915 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 21244331223 its reverse (32213344212), we get a palindrome (53457675435).

The spelling of 21244331223 in words is "twenty-one billion, two hundred forty-four million, three hundred thirty-one thousand, two hundred twenty-three".