11601230721 has 4 divisors (see below), whose sum is σ = 15468307632. Its totient is φ = 7734153812.

The previous prime is 11601230717. The next prime is 11601230743. The reversal of 11601230721 is 12703210611.

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 11601230721 - 2² = 11601230717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11601230691 and 11601230700.

It is not an unprimeable number, because it can be changed into a prime (11601230821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933538451 + ... + 1933538456.

It is an arithmetic number, because the mean of its divisors is an integer number (3867076908).

Almost surely, 2^11601230721 is an apocalyptic number.

It is an amenable number.

11601230721 is a deficient number, since it is larger than the sum of its proper divisors (3867076911).

11601230721 is an equidigital number, since it uses as much as digits as its factorization.

11601230721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867076910.

The product of its (nonzero) digits is 504, while the sum is 24.

The spelling of 11601230721 in words is "eleven billion, six hundred one million, two hundred thirty thousand, seven hundred twenty-one".