21244001104 has 40 divisors (see below), whose sum is σ = 42408117800. Its totient is φ = 10301810688.

The previous prime is 21244001059. The next prime is 21244001111. The reversal of 21244001104 is 40110044212.

It can be written as a sum of positive squares in 4 ways, for example, as 666672400 + 20577328704 = 25820^2 + 143448^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127972 + ... + 242620.

It is an arithmetic number, because the mean of its divisors is an integer number (1060202945).

Almost surely, 2^21244001104 is an apocalyptic number.

It is an amenable number.

21244001104 is a deficient number, since it is larger than the sum of its proper divisors (21164116696).

21244001104 is a wasteful number, since it uses less digits than its factorization.

21244001104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115007 (or 115001 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21244001104 its reverse (40110044212), we get a palindrome (61354045316).

The spelling of 21244001104 in words is "twenty-one billion, two hundred forty-four million, one thousand, one hundred four".