121321307 has 2 divisors, whose sum is σ = 121321308. Its totient is φ = 121321306.

The previous prime is 121321283. The next prime is 121321339. The reversal of 121321307 is 703123121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121321307 - 2⁶ = 121321243 is a prime.

It is not a weakly prime, because it can be changed into another prime (121321357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660653 + 60660654.

It is an arithmetic number, because the mean of its divisors is an integer number (60660654).

Almost surely, 2^121321307 is an apocalyptic number.

121321307 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321307 is an equidigital number, since it uses as much as digits as its factorization.

121321307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 121321307 is about 11014.5951809406. The cubic root of 121321307 is about 495.0461569720.

Adding to 121321307 its reverse (703123121), we get a palindrome (824444428).

The spelling of 121321307 in words is "one hundred twenty-one million, three hundred twenty-one thousand, three hundred seven".