11111115051 has 48 divisors (see below), whose sum is σ = 17978688000. Its totient is φ = 6571217664.

The previous prime is 11111115049. The next prime is 11111115053. The reversal of 11111115051 is 15051111111.

It is an interprime number because it is at equal distance from previous prime (11111115049) and next prime (11111115053).

It is not a de Polignac number, because 11111115051 - 2¹ = 11111115049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111115053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 568890 + ... + 588096.

It is an arithmetic number, because the mean of its divisors is an integer number (374556000).

Almost surely, 2^11111115051 is an apocalyptic number.

11111115051 is a deficient number, since it is larger than the sum of its proper divisors (6867572949).

11111115051 is a wasteful number, since it uses less digits than its factorization.

11111115051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19448 (or 19445 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 18.

Adding to 11111115051 its reverse (15051111111), we get a palindrome (26162226162).

The spelling of 11111115051 in words is "eleven billion, one hundred eleven million, one hundred fifteen thousand, fifty-one".