11121664 has 22 divisors (see below), whose sum is σ = 22234514. Its totient is φ = 5560320.

The previous prime is 11121661. The next prime is 11121667. The reversal of 11121664 is 46612111.

It is an interprime number because it is at equal distance from previous prime (11121661) and next prime (11121667).

It can be written as a sum of positive squares in only one way, i.e., 9048064 + 2073600 = 3008^2 + 1440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4407 + ... + 6454.

Almost surely, 2^11121664 is an apocalyptic number.

It is an amenable number.

11121664 is a deficient number, since it is larger than the sum of its proper divisors (11112850).

11121664 is an equidigital number, since it uses as much as digits as its factorization.

11121664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10881 (or 10863 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 11121664 is about 3334.9158909934. The cubic root of 11121664 is about 223.2149388561.

Adding to 11121664 its reverse (46612111), we get a palindrome (57733775).

The spelling of 11121664 in words is "eleven million, one hundred twenty-one thousand, six hundred sixty-four".