11121112015 has 64 divisors (see below), whose sum is σ = 15628032000. Its totient is φ = 7525799424.

The previous prime is 11121111979. The next prime is 11121112021. The reversal of 11121112015 is 51021112111.

It is not a de Polignac number, because 11121112015 - 2³³ = 2531177423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11121112015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9092694 + ... + 9093916.

It is an arithmetic number, because the mean of its divisors is an integer number (244188000).

Almost surely, 2^11121112015 is an apocalyptic number.

11121112015 is a deficient number, since it is larger than the sum of its proper divisors (4506919985).

11121112015 is a wasteful number, since it uses less digits than its factorization.

11121112015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 11121112015 its reverse (51021112111), we get a palindrome (62142224126).

The spelling of 11121112015 in words is "eleven billion, one hundred twenty-one million, one hundred twelve thousand, fifteen".