21214042113 has 8 divisors (see below), whose sum is σ = 30856788576. Its totient is φ = 12856995200.

The previous prime is 21214042081. The next prime is 21214042123. The reversal of 21214042113 is 31124041212.

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

It is a cyclic number.

It is not a de Polignac number, because 21214042113 - 2⁵ = 21214042081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21214042113.

It is not an unprimeable number, because it can be changed into a prime (21214042123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321424848 + ... + 321424913.

It is an arithmetic number, because the mean of its divisors is an integer number (3857098572).

Almost surely, 2^21214042113 is an apocalyptic number.

It is an amenable number.

21214042113 is a deficient number, since it is larger than the sum of its proper divisors (9642746463).

21214042113 is a wasteful number, since it uses less digits than its factorization.

21214042113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642849775.

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

Adding to 21214042113 its reverse (31124041212), we get a palindrome (52338083325).

Subtracting 21214042113 from its reverse (31124041212), we obtain a palindrome (9909999099).

The spelling of 21214042113 in words is "twenty-one billion, two hundred fourteen million, forty-two thousand, one hundred thirteen".