1216530113232 has 400 divisors, whose sum is σ = 3895141409280. Its totient is φ = 326021971968.

The previous prime is 1216530113207. The next prime is 1216530113233. The reversal of 1216530113232 is 2323110356121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216530113232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216530113233) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 691602369 + ... + 691604127.

Almost surely, 2^{1216530113232} is an apocalyptic number.

1216530113232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216530113232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1947570704640).

1216530113232 is an abundant number, since it is smaller than the sum of its proper divisors (2678611296048).

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

1216530113232 is a wasteful number, since it uses less digits than its factorization.

1216530113232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168 (or 2141 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 1216530113232 its reverse (2323110356121), we get a palindrome (3539640469353).

The spelling of 1216530113232 in words is "one trillion, two hundred sixteen billion, five hundred thirty million, one hundred thirteen thousand, two hundred thirty-two".