1212023321 has 8 divisors (see below), whose sum is σ = 1229969088. Its totient is φ = 1194102000.

The previous prime is 1212023317. The next prime is 1212023339. The reversal of 1212023321 is 1233202121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212023321 - 2² = 1212023317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212023321.

It is not an unprimeable number, because it can be changed into a prime (1212023521) 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 7 ways as a sum of consecutive naturals, for example, 109826 + ... + 120356.

It is an arithmetic number, because the mean of its divisors is an integer number (153746136).

Almost surely, 2^1212023321 is an apocalyptic number.

It is an amenable number.

1212023321 is a deficient number, since it is larger than the sum of its proper divisors (17945767).

1212023321 is a wasteful number, since it uses less digits than its factorization.

1212023321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12223.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1212023321 is about 34814.1253085583. The cubic root of 1212023321 is about 1066.1958606613.

Adding to 1212023321 its reverse (1233202121), we get a palindrome (2445225442).

The spelling of 1212023321 in words is "one billion, two hundred twelve million, twenty-three thousand, three hundred twenty-one".