1155132211 has 4 divisors (see below), whose sum is σ = 1155222424. Its totient is φ = 1155042000.

The previous prime is 1155132203. The next prime is 1155132221. The reversal of 1155132211 is 1122315511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1122315511 = 97 ⋅11570263.

It is a cyclic number.

It is not a de Polignac number, because 1155132211 - 2³ = 1155132203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155132221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21930 + ... + 52831.

It is an arithmetic number, because the mean of its divisors is an integer number (288805606).

Almost surely, 2^1155132211 is an apocalyptic number.

1155132211 is a deficient number, since it is larger than the sum of its proper divisors (90213).

1155132211 is an equidigital number, since it uses as much as digits as its factorization.

1155132211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90212.

The product of its digits is 300, while the sum is 22.

The square root of 1155132211 is about 33987.2360011814. The cubic root of 1155132211 is about 1049.2457806687.

Adding to 1155132211 its reverse (1122315511), we get a palindrome (2277447722).

The spelling of 1155132211 in words is "one billion, one hundred fifty-five million, one hundred thirty-two thousand, two hundred eleven".