21124144204 has 6 divisors (see below), whose sum is σ = 36967252364. Its totient is φ = 10562072100.

The previous prime is 21124144169. The next prime is 21124144309. The reversal of 21124144204 is 40244142112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640518022 + ... + 2640518029.

Almost surely, 2^21124144204 is an apocalyptic number.

It is an amenable number.

21124144204 is a deficient number, since it is larger than the sum of its proper divisors (15843108160).

21124144204 is a wasteful number, since it uses less digits than its factorization.

21124144204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281036055 (or 5281036053 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21124144204 its reverse (40244142112), we get a palindrome (61368286316).

The spelling of 21124144204 in words is "twenty-one billion, one hundred twenty-four million, one hundred forty-four thousand, two hundred four".