1131143211 has 60 divisors (see below), whose sum is σ = 1873611432. Its totient is φ = 679536000.

The previous prime is 1131143183. The next prime is 1131143213. The reversal of 1131143211 is 1123411311.

It is a happy number.

It is not a de Polignac number, because 1131143211 - 2¹⁴ = 1131126827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131143213) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1283491 + ... + 1284371.

Almost surely, 2^1131143211 is an apocalyptic number.

1131143211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131143211 is a deficient number, since it is larger than the sum of its proper divisors (742468221).

1131143211 is a wasteful number, since it uses less digits than its factorization.

1131143211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046 (or 1026 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1131143211 is about 33632.4725674459. The cubic root of 1131143211 is about 1041.9315714904.

Adding to 1131143211 its reverse (1123411311), we get a palindrome (2254554522).

The spelling of 1131143211 in words is "one billion, one hundred thirty-one million, one hundred forty-three thousand, two hundred eleven".