21424313112 has 32 divisors (see below), whose sum is σ = 54091093680. Its totient is φ = 7070729600.

The previous prime is 21424313107. The next prime is 21424313153. The reversal of 21424313112 is 21131342412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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, 4416783 + ... + 4421630.

Almost surely, 2^21424313112 is an apocalyptic number.

It is an amenable number.

21424313112 is an abundant number, since it is smaller than the sum of its proper divisors (32666780568).

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

21424313112 is a wasteful number, since it uses less digits than its factorization.

21424313112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8838523 (or 8838519 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 21424313112 its reverse (21131342412), we get a palindrome (42555655524).

The spelling of 21424313112 in words is "twenty-one billion, four hundred twenty-four million, three hundred thirteen thousand, one hundred twelve".