1213344330 has 128 divisors (see below), whose sum is σ = 3339933696. Its totient is φ = 279417600.

The previous prime is 1213344289. The next prime is 1213344337. The reversal of 1213344330 is 334433121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213344330.

It is not an unprimeable number, because it can be changed into a prime (1213344337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 523875 + ... + 526185.

It is an arithmetic number, because the mean of its divisors is an integer number (26093232).

Almost surely, 2^1213344330 is an apocalyptic number.

1213344330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213344330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669966848).

1213344330 is an abundant number, since it is smaller than the sum of its proper divisors (2126589366).

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

1213344330 is a wasteful number, since it uses less digits than its factorization.

1213344330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1213344330 is about 34833.0924553075. The cubic root of 1213344330 is about 1066.5830762403.

Adding to 1213344330 its reverse (334433121), we get a palindrome (1547777451).

It can be divided in two parts, 1213 and 344330, that added together give a palindrome (345543).

The spelling of 1213344330 in words is "one billion, two hundred thirteen million, three hundred forty-four thousand, three hundred thirty".