1212322321 has 8 divisors (see below), whose sum is σ = 1406191040. Its totient is φ = 1023623568.

The previous prime is 1212322313. The next prime is 1212322327. The reversal of 1212322321 is 1232232121.

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 1212322321 - 2³ = 1212322313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212322327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291986 + ... + 1292923.

It is an arithmetic number, because the mean of its divisors is an integer number (175773880).

Almost surely, 2^1212322321 is an apocalyptic number.

It is an amenable number.

1212322321 is a deficient number, since it is larger than the sum of its proper divisors (193868719).

1212322321 is an equidigital number, since it uses as much as digits as its factorization.

1212322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584983.

The product of its digits is 288, while the sum is 19.

The square root of 1212322321 is about 34818.4192777329. The cubic root of 1212322321 is about 1066.2835284879.

Adding to 1212322321 its reverse (1232232121), we get a palindrome (2444554442).

The spelling of 1212322321 in words is "one billion, two hundred twelve million, three hundred twenty-two thousand, three hundred twenty-one".