21035113 has 4 divisors (see below), whose sum is σ = 22947408. Its totient is φ = 19122820.

The previous prime is 21035111. The next prime is 21035123. The reversal of 21035113 is 31153012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21035113 - 2¹ = 21035111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21035111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956131 + ... + 956152.

It is an arithmetic number, because the mean of its divisors is an integer number (5736852).

Almost surely, 2^21035113 is an apocalyptic number.

It is an amenable number.

21035113 is a deficient number, since it is larger than the sum of its proper divisors (1912295).

21035113 is a wasteful number, since it uses less digits than its factorization.

21035113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912294.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 21035113 is about 4586.4052372201. The cubic root of 21035113 is about 276.0461004349.

Adding to 21035113 its reverse (31153012), we get a palindrome (52188125).

The spelling of 21035113 in words is "twenty-one million, thirty-five thousand, one hundred thirteen".