1131323211 has 24 divisors (see below), whose sum is σ = 1682307120. Its totient is φ = 732079296.

The previous prime is 1131323189. The next prime is 1131323243. The reversal of 1131323211 is 1123231311.

1131323211 is a `hidden beast` number, since 1 + 131 + 323 + 211 = 666.

It is not a de Polignac number, because 1131323211 - 2¹⁹ = 1130798923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131323261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143685 + ... + 151353.

It is an arithmetic number, because the mean of its divisors is an integer number (70096130).

Almost surely, 2^1131323211 is an apocalyptic number.

1131323211 is a deficient number, since it is larger than the sum of its proper divisors (550983909).

1131323211 is a wasteful number, since it uses less digits than its factorization.

1131323211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8155 (or 8152 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1131323211 is about 33635.1484462311. The cubic root of 1131323211 is about 1041.9868364452.

Adding to 1131323211 its reverse (1123231311), we get a palindrome (2254554522).

The spelling of 1131323211 in words is "one billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred eleven".