1311122232 has 96 divisors (see below), whose sum is σ = 4167976800. Its totient is φ = 364476672.

The previous prime is 1311122221. The next prime is 1311122237. The reversal of 1311122232 is 2322211131.

1311122232 is a `hidden beast` number, since 1 + 311 + 122 + 232 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311122237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16507 + ... + 53802.

It is an arithmetic number, because the mean of its divisors is an integer number (43416425).

Almost surely, 2^1311122232 is an apocalyptic number.

1311122232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311122232 is an abundant number, since it is smaller than the sum of its proper divisors (2856854568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311122232 is a wasteful number, since it uses less digits than its factorization.

1311122232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70365 (or 70358 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1311122232 is about 36209.4218677957. The cubic root of 1311122232 is about 1094.4965421848.

Adding to 1311122232 its reverse (2322211131), we get a palindrome (3633333363).

The spelling of 1311122232 in words is "one billion, three hundred eleven million, one hundred twenty-two thousand, two hundred thirty-two".