1155050011 has 4 divisors (see below), whose sum is σ = 1155121632. Its totient is φ = 1154978392.

The previous prime is 1155050009. The next prime is 1155050059. The reversal of 1155050011 is 1100505511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1155050011 - 2¹ = 1155050009 is a prime.

It is a super-2 number, since 2×1155050011² = 2668281055822200242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155350011) 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, 981 + ... + 48073.

It is an arithmetic number, because the mean of its divisors is an integer number (288780408).

Almost surely, 2^1155050011 is an apocalyptic number.

1155050011 is a deficient number, since it is larger than the sum of its proper divisors (71621).

1155050011 is an equidigital number, since it uses as much as digits as its factorization.

1155050011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71620.

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 1155050011 is about 33986.0267021610. The cubic root of 1155050011 is about 1049.2208917286.

Adding to 1155050011 its reverse (1100505511), we get a palindrome (2255555522).

The spelling of 1155050011 in words is "one billion, one hundred fifty-five million, fifty thousand, eleven".