121234121 has 2 divisors, whose sum is σ = 121234122. Its totient is φ = 121234120.

The previous prime is 121234097. The next prime is 121234159. The reversal of 121234121 is 121432121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76825225 + 44408896 = 8765^2 + 6664^2 .

It is a cyclic number.

It is not a de Polignac number, because 121234121 - 2¹⁰ = 121233097 is a 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 121234121.

It is not a weakly prime, because it can be changed into another prime (121234621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60617060 + 60617061.

It is an arithmetic number, because the mean of its divisors is an integer number (60617061).

Almost surely, 2^121234121 is an apocalyptic number.

It is an amenable number.

121234121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121234121 is an equidigital number, since it uses as much as digits as its factorization.

121234121 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 121234121 is about 11010.6367209167. The cubic root of 121234121 is about 494.9275423650.

Adding to 121234121 its reverse (121432121), we get a palindrome (242666242).

The spelling of 121234121 in words is "one hundred twenty-one million, two hundred thirty-four thousand, one hundred twenty-one".