11111240987 has 64 divisors (see below), whose sum is σ = 14918307840. Its totient is φ = 8011008000.

The previous prime is 11111240981. The next prime is 11111241041. The reversal of 11111240987 is 78904211111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11111240987 - 2⁴ = 11111240971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111240981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30275678 + ... + 30276044.

It is an arithmetic number, because the mean of its divisors is an integer number (233098560).

Almost surely, 2^11111240987 is an apocalyptic number.

11111240987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11111240987 is a deficient number, since it is larger than the sum of its proper divisors (3807066853).

11111240987 is a wasteful number, since it uses less digits than its factorization.

11111240987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 11111240987 in words is "eleven billion, one hundred eleven million, two hundred forty thousand, nine hundred eighty-seven".