21102234244 has 24 divisors (see below), whose sum is σ = 45450966848. Its totient is φ = 8348136480.

The previous prime is 21102234187. The next prime is 21102234269. The reversal of 21102234244 is 44243220112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28986222 + ... + 28986949.

Almost surely, 2^21102234244 is an apocalyptic number.

It is an amenable number.

21102234244 is an abundant number, since it is smaller than the sum of its proper divisors (24348732604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102234244 is a wasteful number, since it uses less digits than its factorization.

21102234244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57973195 (or 57973193 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21102234244 its reverse (44243220112), we get a palindrome (65345454356).

The spelling of 21102234244 in words is "twenty-one billion, one hundred two million, two hundred thirty-four thousand, two hundred forty-four".