123234121 has 2 divisors, whose sum is σ = 123234122. Its totient is φ = 123234120.

The previous prime is 123234119. The next prime is 123234127. The reversal of 123234121 is 121432321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81812025 + 41422096 = 9045^2 + 6436^2 .

It is an emirp because it is prime and its reverse (121432321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123234121 - 2¹ = 123234119 is a prime.

Together with 123234119, it forms a pair of twin primes.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (123234127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61617060 + 61617061.

It is an arithmetic number, because the mean of its divisors is an integer number (61617061).

Almost surely, 2^123234121 is an apocalyptic number.

It is an amenable number.

123234121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123234121 is an equidigital number, since it uses as much as digits as its factorization.

123234121 is an evil number, because the sum of its binary digits is even.

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

The square root of 123234121 is about 11101.0864783588. The cubic root of 123234121 is about 497.6343194301.

Adding to 123234121 its reverse (121432321), we get a palindrome (244666442).

It can be divided in two parts, 1232 and 34121, that added together give a palindrome (35353).

The spelling of 123234121 in words is "one hundred twenty-three million, two hundred thirty-four thousand, one hundred twenty-one".