1213200321 has 8 divisors (see below), whose sum is σ = 1617814080. Its totient is φ = 808693392.

The previous prime is 1213200319. The next prime is 1213200367. The reversal of 1213200321 is 1230023121.

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

It is not a de Polignac number, because 1213200321 - 2¹ = 1213200319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213200321.

It is not an unprimeable number, because it can be changed into a prime (1213200311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5260 + ... + 49538.

It is an arithmetic number, because the mean of its divisors is an integer number (202226760).

Almost surely, 2^1213200321 is an apocalyptic number.

It is an amenable number.

1213200321 is a deficient number, since it is larger than the sum of its proper divisors (404613759).

1213200321 is an equidigital number, since it uses as much as digits as its factorization.

1213200321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53415.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1213200321 is about 34831.0252648411. The cubic root of 1213200321 is about 1066.5408778208.

Adding to 1213200321 its reverse (1230023121), we get a palindrome (2443223442).

The spelling of 1213200321 in words is "one billion, two hundred thirteen million, two hundred thousand, three hundred twenty-one".