11613121 has 4 divisors (see below), whose sum is σ = 12506452. Its totient is φ = 10719792.

The previous prime is 11613113. The next prime is 11613143. The reversal of 11613121 is 12131611.

11613121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12131611 = 233 ⋅52067.

It can be written as a sum of positive squares in 2 ways, for example, as 5948721 + 5664400 = 2439^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 11613121 - 2³ = 11613113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11613095 and 11613104.

It is not an unprimeable number, because it can be changed into a prime (11613101) 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, 446646 + ... + 446671.

It is an arithmetic number, because the mean of its divisors is an integer number (3126613).

Almost surely, 2^11613121 is an apocalyptic number.

It is an amenable number.

11613121 is a deficient number, since it is larger than the sum of its proper divisors (893331).

11613121 is an equidigital number, since it uses as much as digits as its factorization.

11613121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893330.

The product of its digits is 36, while the sum is 16.

The square root of 11613121 is about 3407.8029579188. The cubic root of 11613121 is about 226.4555577192.

Adding to 11613121 its reverse (12131611), we get a palindrome (23744732).

The spelling of 11613121 in words is "eleven million, six hundred thirteen thousand, one hundred twenty-one".