21100234244 has 6 divisors (see below), whose sum is σ = 36925409934. Its totient is φ = 10550117120.

The previous prime is 21100234241. The next prime is 21100234249. The reversal of 21100234244 is 44243200112.

It can be written as a sum of positive squares in only one way, i.e., 19810562500 + 1289671744 = 140750^2 + 35912^2 .

It is not an unprimeable number, because it can be changed into a prime (21100234241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2637529277 + ... + 2637529284.

It is an arithmetic number, because the mean of its divisors is an integer number (6154234989).

Almost surely, 2^21100234244 is an apocalyptic number.

It is an amenable number.

21100234244 is a deficient number, since it is larger than the sum of its proper divisors (15825175690).

21100234244 is a wasteful number, since it uses less digits than its factorization.

21100234244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275058565 (or 5275058563 counting only the distinct ones).

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

Adding to 21100234244 its reverse (44243200112), we get a palindrome (65343434356).

The spelling of 21100234244 in words is "twenty-one billion, one hundred million, two hundred thirty-four thousand, two hundred forty-four".