11121388 has 12 divisors (see below), whose sum is σ = 19556152. Its totient is φ = 5533920.

The previous prime is 11121371. The next prime is 11121389. The reversal of 11121388 is 88312111.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11121389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5745 + ... + 7432.

Almost surely, 2^11121388 is an apocalyptic number.

It is an amenable number.

11121388 is a deficient number, since it is larger than the sum of its proper divisors (8434764).

11121388 is a wasteful number, since it uses less digits than its factorization.

11121388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13392 (or 13390 counting only the distinct ones).

The product of its digits is 384, while the sum is 25.

The square root of 11121388 is about 3334.8745103827. The cubic root of 11121388 is about 223.2130923749.

Adding to 11121388 its reverse (88312111), we get a palindrome (99433499).

It can be divided in two parts, 1112 and 1388, that added together give a square (2500 = 50²).

The spelling of 11121388 in words is "eleven million, one hundred twenty-one thousand, three hundred eighty-eight".