21424105050012 has 72 divisors (see below), whose sum is σ = 61952597616000. Its totient is φ = 6115165759008.

The previous prime is 21424105050011. The next prime is 21424105050013. The reversal of 21424105050012 is 21005050142412.

It is a happy number.

21424105050012 is a `hidden beast` number, since 2 + 1 + 42 + 4 + 105 + 0 + 500 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (21424105050011) and next prime (21424105050013).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424105050011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41458762 + ... + 41972337.

Almost surely, 2^{21424105050012} is an apocalyptic number.

It is an amenable number.

21424105050012 is an abundant number, since it is smaller than the sum of its proper divisors (40528492565988).

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

21424105050012 is a wasteful number, since it uses less digits than its factorization.

21424105050012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83432135 (or 83432130 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 21424105050012 its reverse (21005050142412), we get a palindrome (42429155192424).

The spelling of 21424105050012 in words is "twenty-one trillion, four hundred twenty-four billion, one hundred five million, fifty thousand, twelve".