11221145 has 8 divisors (see below), whose sum is σ = 14501256. Its totient is φ = 8286336.

The previous prime is 11221141. The next prime is 11221159. The reversal of 11221145 is 54112211.

11221145 is digitally balanced in base 2 and base 3, 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 4 ways, for example, as 38809 + 11182336 = 197^2 + 3344^2 .

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 11221145 - 2² = 11221141 is a prime.

It is a super-2 number, since 2×11221145² = 251828190222050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221141) 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, 86252 + ... + 86381.

It is an arithmetic number, because the mean of its divisors is an integer number (1812657).

Almost surely, 2^11221145 is an apocalyptic number.

It is an amenable number.

11221145 is a deficient number, since it is larger than the sum of its proper divisors (3280111).

11221145 is a wasteful number, since it uses less digits than its factorization.

11221145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172651.

The product of its digits is 80, while the sum is 17.

The square root of 11221145 is about 3349.7977550891. The cubic root of 11221145 is about 223.8785015533.

Adding to 11221145 its reverse (54112211), we get a palindrome (65333356).

The spelling of 11221145 in words is "eleven million, two hundred twenty-one thousand, one hundred forty-five".