11121987 has 8 divisors (see below), whose sum is σ = 14881104. Its totient is φ = 7388768.

The previous prime is 11121977. The next prime is 11121989. The reversal of 11121987 is 78912111.

11121987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11121987 - 2⁸ = 11121731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11121989) 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, 5448 + ... + 7205.

It is an arithmetic number, because the mean of its divisors is an integer number (1860138).

Almost surely, 2^11121987 is an apocalyptic number.

11121987 is a deficient number, since it is larger than the sum of its proper divisors (3759117).

11121987 is a wasteful number, since it uses less digits than its factorization.

11121987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12949.

The product of its digits is 1008, while the sum is 30.

The square root of 11121987 is about 3334.9643176502. The cubic root of 11121987 is about 223.2170997356.

The spelling of 11121987 in words is "eleven million, one hundred twenty-one thousand, nine hundred eighty-seven".