21110403224 has 32 divisors (see below), whose sum is σ = 40250028000. Its totient is φ = 10377227520.

The previous prime is 21110403199. The next prime is 21110403229. The reversal of 21110403224 is 42230401112.

It is a junction number, because it is equal to n+sod(n) for n = 21110403196 and 21110403205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110403229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150877 + ... + 1169075.

It is an arithmetic number, because the mean of its divisors is an integer number (1257813375).

Almost surely, 2^21110403224 is an apocalyptic number.

It is an amenable number.

21110403224 is a deficient number, since it is larger than the sum of its proper divisors (19139624776).

21110403224 is a wasteful number, since it uses less digits than its factorization.

21110403224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20643 (or 20639 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21110403224 its reverse (42230401112), we get a palindrome (63340804336).

The spelling of 21110403224 in words is "twenty-one billion, one hundred ten million, four hundred three thousand, two hundred twenty-four".