21224104223 has 24 divisors (see below), whose sum is σ = 27123081600. Its totient is φ = 16220780928.

The previous prime is 21224104211. The next prime is 21224104249. The reversal of 21224104223 is 32240142212.

It is not a de Polignac number, because 21224104223 - 2¹² = 21224100127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224104423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237653 + ... + 314526.

It is an arithmetic number, because the mean of its divisors is an integer number (1130128400).

Almost surely, 2^21224104223 is an apocalyptic number.

21224104223 is a deficient number, since it is larger than the sum of its proper divisors (5898977377).

21224104223 is a wasteful number, since it uses less digits than its factorization.

21224104223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552239 (or 552222 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21224104223 its reverse (32240142212), we get a palindrome (53464246435).

The spelling of 21224104223 in words is "twenty-one billion, two hundred twenty-four million, one hundred four thousand, two hundred twenty-three".