1213133321 has 8 divisors (see below), whose sum is σ = 1278414144. Its totient is φ = 1148897200.

The previous prime is 1213133303. The next prime is 1213133333. The reversal of 1213133321 is 1233313121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213133321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213133293 and 1213133302.

It is not an unprimeable number, because it can be changed into a prime (1213133351) 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 7 ways as a sum of consecutive naturals, for example, 258791 + ... + 263436.

It is an arithmetic number, because the mean of its divisors is an integer number (159801768).

Almost surely, 2^1213133321 is an apocalyptic number.

It is an amenable number.

1213133321 is a deficient number, since it is larger than the sum of its proper divisors (65280823).

1213133321 is a wasteful number, since it uses less digits than its factorization.

1213133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522351.

The product of its digits is 324, while the sum is 20.

The square root of 1213133321 is about 34830.0634653456. The cubic root of 1213133321 is about 1066.5212439227.

Adding to 1213133321 its reverse (1233313121), we get a palindrome (2446446442).

The spelling of 1213133321 in words is "one billion, two hundred thirteen million, one hundred thirty-three thousand, three hundred twenty-one".