1212231132 has 36 divisors (see below), whose sum is σ = 3502001776. Its totient is φ = 346351680.

The previous prime is 1212231127. The next prime is 1212231149. The reversal of 1212231132 is 2311322121.

It is a tau number, because it is divible by the number of its divisors (36).

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 an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2404969 + ... + 2405472.

Almost surely, 2^1212231132 is an apocalyptic number.

1212231132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212231132 is an abundant number, since it is smaller than the sum of its proper divisors (2289770644).

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

1212231132 is a wasteful number, since it uses less digits than its factorization.

1212231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810458 (or 4810453 counting only the distinct ones).

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

The square root of 1212231132 is about 34817.1097594272. The cubic root of 1212231132 is about 1066.2567930878.

Adding to 1212231132 its reverse (2311322121), we get a palindrome (3523553253).

The spelling of 1212231132 in words is "one billion, two hundred twelve million, two hundred thirty-one thousand, one hundred thirty-two".