1212304121 has 8 divisors (see below), whose sum is σ = 1386127680. Its totient is φ = 1038639888.

The previous prime is 1212304109. The next prime is 1212304189. The reversal of 1212304121 is 1214032121.

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 1212304121 - 2¹⁴ = 1212287737 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212304121.

It is not an unprimeable number, because it can be changed into a prime (1212304421) 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, 23051 + ... + 54368.

It is an arithmetic number, because the mean of its divisors is an integer number (173265960).

Almost surely, 2^1212304121 is an apocalyptic number.

It is an amenable number.

1212304121 is a deficient number, since it is larger than the sum of its proper divisors (173823559).

1212304121 is an equidigital number, since it uses as much as digits as its factorization.

1212304121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79663.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1212304121 is about 34818.1579208321. The cubic root of 1212304121 is about 1066.2781925974.

Adding to 1212304121 its reverse (1214032121), we get a palindrome (2426336242).

Subtracting 1212304121 from its reverse (1214032121), we obtain a cube (1728000 = 120³).

The spelling of 1212304121 in words is "one billion, two hundred twelve million, three hundred four thousand, one hundred twenty-one".