11121505 has 8 divisors (see below), whose sum is σ = 13371624. Its totient is φ = 8880000.

The previous prime is 11121503. The next prime is 11121521. The reversal of 11121505 is 50512111.

11121505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2193361 + 8928144 = 1481^2 + 2988^2 .

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

It is not a de Polignac number, because 11121505 - 2¹ = 11121503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155 + ... + 4855.

It is an arithmetic number, because the mean of its divisors is an integer number (1671453).

Almost surely, 2^11121505 is an apocalyptic number.

It is an amenable number.

11121505 is a deficient number, since it is larger than the sum of its proper divisors (2250119).

11121505 is an equidigital number, since it uses as much as digits as its factorization.

11121505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 11121505 is about 3334.8920522260. The cubic root of 11121505 is about 223.2138751261.

Adding to 11121505 its reverse (50512111), we get a palindrome (61633616).

The spelling of 11121505 in words is "eleven million, one hundred twenty-one thousand, five hundred five".