1213330320 has 160 divisors (see below), whose sum is σ = 4223063040. Its totient is φ = 320163840.

The previous prime is 1213330303. The next prime is 1213330351. The reversal of 1213330320 is 230333121.

1213330320 is a `hidden beast` number, since 1 + 2 + 13 + 330 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1213330293 and 1213330302.

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 31 ways as a sum of consecutive naturals, for example, 206625 + ... + 212415.

It is an arithmetic number, because the mean of its divisors is an integer number (26394144).

Almost surely, 2^1213330320 is an apocalyptic number.

1213330320 is a gapful number since it is divisible by the number (10) 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 1213330320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2111531520).

1213330320 is an abundant number, since it is smaller than the sum of its proper divisors (3009732720).

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

1213330320 is a wasteful number, since it uses less digits than its factorization.

1213330320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910 (or 5898 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1213330320 is about 34832.8913528579. The cubic root of 1213330320 is about 1066.5789710890.

Adding to 1213330320 its reverse (230333121), we get a palindrome (1443663441).

The spelling of 1213330320 in words is "one billion, two hundred thirteen million, three hundred thirty thousand, three hundred twenty".