11721127 has 4 divisors (see below), whose sum is σ = 12786696. Its totient is φ = 10655560.

The previous prime is 11721113. The next prime is 11721139. The reversal of 11721127 is 72112711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11721127 - 2¹¹ = 11719079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11721098 and 11721107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11721107) 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, 532768 + ... + 532789.

It is an arithmetic number, because the mean of its divisors is an integer number (3196674).

Almost surely, 2^11721127 is an apocalyptic number.

11721127 is a deficient number, since it is larger than the sum of its proper divisors (1065569).

11721127 is a wasteful number, since it uses less digits than its factorization.

11721127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065568.

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

The square root of 11721127 is about 3423.6131498754. The cubic root of 11721127 is about 227.1554305614.

Adding to 11721127 its reverse (72112711), we get a palindrome (83833838).

It can be divided in two parts, 11 and 721127, that multiplied together give a palindrome (7932397).

The spelling of 11721127 in words is "eleven million, seven hundred twenty-one thousand, one hundred twenty-seven".