21421024113 has 8 divisors (see below), whose sum is σ = 28823396800. Its totient is φ = 14149667088.

The previous prime is 21421024081. The next prime is 21421024117. The reversal of 21421024113 is 31142012412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21421024113 - 2⁵ = 21421024081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21421024113.

It is not an unprimeable number, because it can be changed into a prime (21421024117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32753533 + ... + 32754186.

It is an arithmetic number, because the mean of its divisors is an integer number (3602924600).

Almost surely, 2^21421024113 is an apocalyptic number.

It is an amenable number.

21421024113 is a deficient number, since it is larger than the sum of its proper divisors (7402372687).

21421024113 is a wasteful number, since it uses less digits than its factorization.

21421024113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65507831.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21421024113 its reverse (31142012412), we get a palindrome (52563036525).

The spelling of 21421024113 in words is "twenty-one billion, four hundred twenty-one million, twenty-four thousand, one hundred thirteen".