121412321 has 2 divisors, whose sum is σ = 121412322. Its totient is φ = 121412320.

The previous prime is 121412303. The next prime is 121412329. The reversal of 121412321 is 123214121.

121412321 is nontrivially palindromic in base 3.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71639296 + 49773025 = 8464^2 + 7055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121412321 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121412321.

It is not a weakly prime, because it can be changed into another prime (121412329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60706160 + 60706161.

It is an arithmetic number, because the mean of its divisors is an integer number (60706161).

Almost surely, 2^121412321 is an apocalyptic number.

It is an amenable number.

121412321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121412321 is an equidigital number, since it uses as much as digits as its factorization.

121412321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 121412321 is about 11018.7259245341. The cubic root of 121412321 is about 495.1699188784.

Adding to 121412321 its reverse (123214121), we get a palindrome (244626442).

The spelling of 121412321 in words is "one hundred twenty-one million, four hundred twelve thousand, three hundred twenty-one".