121144321 has 2 divisors, whose sum is σ = 121144322. Its totient is φ = 121144320.

The previous prime is 121144313. The next prime is 121144337. The reversal of 121144321 is 123441121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98724096 + 22420225 = 9936^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 121144321 - 2³ = 121144313 is a prime.

It is a super-3 number, since 3×121144321³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121144421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60572160 + 60572161.

It is an arithmetic number, because the mean of its divisors is an integer number (60572161).

Almost surely, 2^121144321 is an apocalyptic number.

It is an amenable number.

121144321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121144321 is an equidigital number, since it uses as much as digits as its factorization.

121144321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

The square root of 121144321 is about 11006.5580905204. The cubic root of 121144321 is about 494.8053120033.

Adding to 121144321 its reverse (123441121), we get a palindrome (244585442).

The spelling of 121144321 in words is "one hundred twenty-one million, one hundred forty-four thousand, three hundred twenty-one".