1211321132 has 12 divisors (see below), whose sum is σ = 2422642320. Its totient is φ = 519137616.

The previous prime is 1211321123. The next prime is 1211321149. The reversal of 1211321132 is 2311231121.

1211321132 is an admirable number.

It is a super-2 number, since 2×1211321132² = 2934597769659522848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1211321132.

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 3 ways as a sum of consecutive naturals, for example, 21630707 + ... + 21630762.

It is an arithmetic number, because the mean of its divisors is an integer number (201886860).

Almost surely, 2^1211321132 is an apocalyptic number.

It is an amenable number.

1211321132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1211321132 is a wasteful number, since it uses less digits than its factorization.

1211321132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43261480 (or 43261478 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1211321132 is about 34804.0390184817. The cubic root of 1211321132 is about 1065.9899197303.

Adding to 1211321132 its reverse (2311231121), we get a palindrome (3522552253).

The spelling of 1211321132 in words is "one billion, two hundred eleven million, three hundred twenty-one thousand, one hundred thirty-two".