1131144211 has 4 divisors (see below), whose sum is σ = 1137066624. Its totient is φ = 1125221800.

The previous prime is 1131144173. The next prime is 1131144227. The reversal of 1131144211 is 1124411311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1124411311 = 467 ⋅2407733.

It is a cyclic number.

It is not a de Polignac number, because 1131144211 - 2²⁹ = 594273299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131144251) 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, 2960920 + ... + 2961301.

It is an arithmetic number, because the mean of its divisors is an integer number (284266656).

Almost surely, 2^1131144211 is an apocalyptic number.

1131144211 is a deficient number, since it is larger than the sum of its proper divisors (5922413).

1131144211 is an equidigital number, since it uses as much as digits as its factorization.

1131144211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5922412.

The product of its digits is 96, while the sum is 19.

The square root of 1131144211 is about 33632.4874340272. The cubic root of 1131144211 is about 1041.9318785341.

Adding to 1131144211 its reverse (1124411311), we get a palindrome (2255555522).

The spelling of 1131144211 in words is "one billion, one hundred thirty-one million, one hundred forty-four thousand, two hundred eleven".