21241222104 has 16 divisors (see below), whose sum is σ = 53103055320. Its totient is φ = 7080407360.

The previous prime is 21241222097. The next prime is 21241222109. The reversal of 21241222104 is 40122214212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241222109) by changing a digit.

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, 442525437 + ... + 442525484.

Almost surely, 2^21241222104 is an apocalyptic number.

21241222104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21241222104 is an abundant number, since it is smaller than the sum of its proper divisors (31861833216).

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

21241222104 is a wasteful number, since it uses less digits than its factorization.

21241222104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885050930 (or 885050926 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21241222104 its reverse (40122214212), we get a palindrome (61363436316).

The spelling of 21241222104 in words is "twenty-one billion, two hundred forty-one million, two hundred twenty-two thousand, one hundred four".