21104220232 has 16 divisors (see below), whose sum is σ = 40241098800. Its totient is φ = 10373260560.

The previous prime is 21104220229. The next prime is 21104220233. The reversal of 21104220232 is 23202240112.

It is a super-2 number, since 2×21104220232² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21104220233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22355694 + ... + 22356637.

It is an arithmetic number, because the mean of its divisors is an integer number (2515068675).

Almost surely, 2^21104220232 is an apocalyptic number.

It is an amenable number.

21104220232 is a deficient number, since it is larger than the sum of its proper divisors (19136878568).

21104220232 is a wasteful number, since it uses less digits than its factorization.

21104220232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44712396 (or 44712392 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21104220232 its reverse (23202240112), we get a palindrome (44306460344).

The spelling of 21104220232 in words is "twenty-one billion, one hundred four million, two hundred twenty thousand, two hundred thirty-two".