1213320132 has 72 divisors (see below), whose sum is σ = 3203491200. Its totient is φ = 386814528.

The previous prime is 1213320113. The next prime is 1213320133. The reversal of 1213320132 is 2310233121.

1213320132 is a `hidden beast` number, since 1 + 213 + 320 + 132 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1213320133) 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, 70869 + ... + 86307.

Almost surely, 2^1213320132 is an apocalyptic number.

1213320132 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 1213320132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601745600).

1213320132 is an abundant number, since it is smaller than the sum of its proper divisors (1990171068).

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

1213320132 is a wasteful number, since it uses less digits than its factorization.

1213320132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15545 (or 15540 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213320132 is about 34832.7451114609. The cubic root of 1213320132 is about 1066.5759858241.

Adding to 1213320132 its reverse (2310233121), we get a palindrome (3523553253).

The spelling of 1213320132 in words is "one billion, two hundred thirteen million, three hundred twenty thousand, one hundred thirty-two".