1115550011 has 4 divisors (see below), whose sum is σ = 1130831592. Its totient is φ = 1100268432.

The previous prime is 1115550001. The next prime is 1115550041. The reversal of 1115550011 is 1100555111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1100555111 = 211 ⋅5215901.

It is a cyclic number.

It is not a de Polignac number, because 1115550011 - 2¹⁸ = 1115287867 is a prime.

It is a super-3 number, since 3×1115550011³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1115550001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7640681 + ... + 7640826.

It is an arithmetic number, because the mean of its divisors is an integer number (282707898).

Almost surely, 2^1115550011 is an apocalyptic number.

1115550011 is a deficient number, since it is larger than the sum of its proper divisors (15281581).

1115550011 is an equidigital number, since it uses as much as digits as its factorization.

1115550011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15281580.

The product of its (nonzero) digits is 125, while the sum is 20.

The square root of 1115550011 is about 33399.8504637371. The cubic root of 1115550011 is about 1037.1216053879.

The spelling of 1115550011 in words is "one billion, one hundred fifteen million, five hundred fifty thousand, eleven".