21060113 has 4 divisors (see below), whose sum is σ = 22168560. Its totient is φ = 19951668.

The previous prime is 21060097. The next prime is 21060131. The reversal of 21060113 is 31106012.

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 21060113 - 2⁴ = 21060097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21060163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554195 + ... + 554232.

It is an arithmetic number, because the mean of its divisors is an integer number (5542140).

Almost surely, 2^21060113 is an apocalyptic number.

It is an amenable number.

21060113 is a deficient number, since it is larger than the sum of its proper divisors (1108447).

21060113 is a wasteful number, since it uses less digits than its factorization.

21060113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108446.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 21060113 is about 4589.1298739521. The cubic root of 21060113 is about 276.1554163889.

Adding to 21060113 its reverse (31106012), we get a palindrome (52166125).

The spelling of 21060113 in words is "twenty-one million, sixty thousand, one hundred thirteen".