11127721 has 8 divisors (see below), whose sum is σ = 12369024. Its totient is φ = 9924720.

The previous prime is 11127691. The next prime is 11127733. The reversal of 11127721 is 12772111.

11127721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11127721 - 2¹³ = 11119529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11127692 and 11127701.

It is not an unprimeable number, because it can be changed into a prime (11127751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8961 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (1546128).

Almost surely, 2^11127721 is an apocalyptic number.

11127721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11127721 is a deficient number, since it is larger than the sum of its proper divisors (1241303).

11127721 is a wasteful number, since it uses less digits than its factorization.

11127721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151.

The product of its digits is 196, while the sum is 22.

The square root of 11127721 is about 3335.8238862386. The cubic root of 11127721 is about 223.2554534026.

Adding to 11127721 its reverse (12772111), we get a palindrome (23899832).

The spelling of 11127721 in words is "eleven million, one hundred twenty-seven thousand, seven hundred twenty-one".