1220132312 has 64 divisors (see below), whose sum is σ = 2711016000. Its totient is φ = 503709696.

The previous prime is 1220132299. The next prime is 1220132339. The reversal of 1220132312 is 2132310221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248368 + ... + 1249344.

It is an arithmetic number, because the mean of its divisors is an integer number (42359625).

Almost surely, 2^1220132312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220132312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355508000).

1220132312 is an abundant number, since it is smaller than the sum of its proper divisors (1490883688).

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

1220132312 is a wasteful number, since it uses less digits than its factorization.

1220132312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788 (or 1784 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1220132312 is about 34930.3923825656. The cubic root of 1220132312 is about 1068.5683569781.

Adding to 1220132312 its reverse (2132310221), we get a palindrome (3352442533).

The spelling of 1220132312 in words is "one billion, two hundred twenty million, one hundred thirty-two thousand, three hundred twelve".