121040321 has 2 divisors, whose sum is σ = 121040322. Its totient is φ = 121040320.

The previous prime is 121040291. The next prime is 121040341. The reversal of 121040321 is 123040121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107350321 + 13690000 = 10361^2 + 3700^2 .

It is an emirp because it is prime and its reverse (123040121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121040321 - 2²⁶ = 53931457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121040296 and 121040305.

It is not a weakly prime, because it can be changed into another prime (121040341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60520160 + 60520161.

It is an arithmetic number, because the mean of its divisors is an integer number (60520161).

Almost surely, 2^121040321 is an apocalyptic number.

It is an amenable number.

121040321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121040321 is an equidigital number, since it uses as much as digits as its factorization.

121040321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121040321 is about 11001.8326200683. The cubic root of 121040321 is about 494.6636779457.

Adding to 121040321 its reverse (123040121), we get a palindrome (244080442).

The spelling of 121040321 in words is "one hundred twenty-one million, forty thousand, three hundred twenty-one".