21422424501 has 12 divisors (see below), whose sum is σ = 30945076812. Its totient is φ = 14280889536.

The previous prime is 21422424487. The next prime is 21422424521. The reversal of 21422424501 is 10542422412.

It is a happy number.

21422424501 is a `hidden beast` number, since 214 + 22 + 424 + 5 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16984866276 + 4437558225 = 130326^2 + 66615^2 .

It is not a de Polignac number, because 21422424501 - 2⁹ = 21422423989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422424521) 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 11 ways as a sum of consecutive naturals, for example, 173865 + ... + 270321.

It is an arithmetic number, because the mean of its divisors is an integer number (2578756401).

Almost surely, 2^21422424501 is an apocalyptic number.

It is an amenable number.

21422424501 is a deficient number, since it is larger than the sum of its proper divisors (9522652311).

21422424501 is a wasteful number, since it uses less digits than its factorization.

21422424501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121140 (or 121137 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 21422424501 its reverse (10542422412), we get a palindrome (31964846913).

The spelling of 21422424501 in words is "twenty-one billion, four hundred twenty-two million, four hundred twenty-four thousand, five hundred one".