21124122104 has 16 divisors (see below), whose sum is σ = 39734275920. Its totient is φ = 10528315200.

The previous prime is 21124122059. The next prime is 21124122127. The reversal of 21124122104 is 40122142112.

It is a congruent 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 in 3 ways as a sum of consecutive naturals, for example, 4215572 + ... + 4220579.

It is an arithmetic number, because the mean of its divisors is an integer number (2483392245).

Almost surely, 2^21124122104 is an apocalyptic number.

It is an amenable number.

21124122104 is a deficient number, since it is larger than the sum of its proper divisors (18610153816).

21124122104 is a wasteful number, since it uses less digits than its factorization.

21124122104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8436470 (or 8436466 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21124122104 its reverse (40122142112), we get a palindrome (61246264216).

The spelling of 21124122104 in words is "twenty-one billion, one hundred twenty-four million, one hundred twenty-two thousand, one hundred four".