21113441223 has 16 divisors (see below), whose sum is σ = 32921070336. Its totient is φ = 11784245760.

The previous prime is 21113441203. The next prime is 21113441233. The reversal of 21113441223 is 32214431112.

It is not a de Polignac number, because 21113441223 - 2⁸ = 21113440967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113441193 and 21113441202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113441203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11689818 + ... + 11691623.

It is an arithmetic number, because the mean of its divisors is an integer number (2057566896).

Almost surely, 2^21113441223 is an apocalyptic number.

21113441223 is a deficient number, since it is larger than the sum of its proper divisors (11807629113).

21113441223 is a wasteful number, since it uses less digits than its factorization.

21113441223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23381494.

The product of its digits is 1152, while the sum is 24.

Adding to 21113441223 its reverse (32214431112), we get a palindrome (53327872335).

The spelling of 21113441223 in words is "twenty-one billion, one hundred thirteen million, four hundred forty-one thousand, two hundred twenty-three".