11291121 has 12 divisors (see below), whose sum is σ = 16872180. Its totient is φ = 7267680.

The previous prime is 11291117. The next prime is 11291123. The reversal of 11291121 is 12119211.

It is a happy number.

11291121 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6051600 + 5239521 = 2460^2 + 2289^2 .

It is not a de Polignac number, because 11291121 - 2² = 11291117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11291094 and 11291103.

It is not an unprimeable number, because it can be changed into a prime (11291123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21370 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (1406015).

Almost surely, 2^11291121 is an apocalyptic number.

It is an amenable number.

11291121 is a deficient number, since it is larger than the sum of its proper divisors (5581059).

11291121 is a wasteful number, since it uses less digits than its factorization.

11291121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43296 (or 43293 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 11291121 is about 3360.2263316628. The cubic root of 11291121 is about 224.3429125469.

The spelling of 11291121 in words is "eleven million, two hundred ninety-one thousand, one hundred twenty-one".