21136113 has 16 divisors (see below), whose sum is σ = 32961600. Its totient is φ = 13348800.

The previous prime is 21136069. The next prime is 21136123. The reversal of 21136113 is 31163112.

It is not a de Polignac number, because 21136113 - 2⁸ = 21135857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21136123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20088 + ... + 21113.

It is an arithmetic number, because the mean of its divisors is an integer number (2060100).

Almost surely, 2^21136113 is an apocalyptic number.

It is an amenable number.

21136113 is a deficient number, since it is larger than the sum of its proper divisors (11825487).

21136113 is a wasteful number, since it uses less digits than its factorization.

21136113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41229 (or 41223 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 21136113 is about 4597.4028537860. The cubic root of 21136113 is about 276.4872065646.

Adding to 21136113 its reverse (31163112), we get a palindrome (52299225).

The spelling of 21136113 in words is "twenty-one million, one hundred thirty-six thousand, one hundred thirteen".