121234321 has 16 divisors (see below), whose sum is σ = 133499520. Its totient is φ = 109411200.

The previous prime is 121234279. The next prime is 121234339. The reversal of 121234321 is 123432121.

It is a happy number.

121234321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 121234321 - 2⁹ = 121233809 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121234381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201421 + ... + 202021.

It is an arithmetic number, because the mean of its divisors is an integer number (8343720).

Almost surely, 2^121234321 is an apocalyptic number.

It is an amenable number.

121234321 is a deficient number, since it is larger than the sum of its proper divisors (12265199).

121234321 is a wasteful number, since it uses less digits than its factorization.

121234321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

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

The square root of 121234321 is about 11010.6458030399. The cubic root of 121234321 is about 494.9278145256.

Adding to 121234321 its reverse (123432121), we get a palindrome (244666442).

The spelling of 121234321 in words is "one hundred twenty-one million, two hundred thirty-four thousand, three hundred twenty-one".