113210521 has 4 divisors (see below), whose sum is σ = 113628544. Its totient is φ = 112792500.

The previous prime is 113210507. The next prime is 113210549. The reversal of 113210521 is 125012311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125012311 = 367 ⋅340633.

It is a cyclic number.

It is not a de Polignac number, because 113210521 - 2²¹ = 111113369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113210495 and 113210504.

It is not an unprimeable number, because it can be changed into a prime (113210551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208605 + ... + 209146.

It is an arithmetic number, because the mean of its divisors is an integer number (28407136).

Almost surely, 2^113210521 is an apocalyptic number.

It is an amenable number.

113210521 is a deficient number, since it is larger than the sum of its proper divisors (418023).

113210521 is an equidigital number, since it uses as much as digits as its factorization.

113210521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418022.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 113210521 is about 10640.0432799872. The cubic root of 113210521 is about 483.7588572338.

Adding to 113210521 its reverse (125012311), we get a palindrome (238222832).

The spelling of 113210521 in words is "one hundred thirteen million, two hundred ten thousand, five hundred twenty-one".