11121663 has 8 divisors (see below), whose sum is σ = 16947328. Its totient is φ = 6355224.

The previous prime is 11121661. The next prime is 11121667. The reversal of 11121663 is 36612111.

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

It is not a de Polignac number, because 11121663 - 2¹ = 11121661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 529603 = 11121663 / (1 + 1 + 1 + 2 + 1 + 6 + 6 + 3).

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264781 + ... + 264822.

It is an arithmetic number, because the mean of its divisors is an integer number (2118416).

Almost surely, 2^11121663 is an apocalyptic number.

11121663 is a deficient number, since it is larger than the sum of its proper divisors (5825665).

11121663 is an equidigital number, since it uses as much as digits as its factorization.

11121663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529613.

The product of its digits is 216, while the sum is 21.

The square root of 11121663 is about 3334.9157410645. The cubic root of 11121663 is about 223.2149321661.

Adding to 11121663 its reverse (36612111), we get a palindrome (47733774).

It can be divided in two parts, 1112 and 1663, that added together give a triangular number (2775 = T₇₄).

The spelling of 11121663 in words is "eleven million, one hundred twenty-one thousand, six hundred sixty-three".