121331347 has 2 divisors, whose sum is σ = 121331348. Its totient is φ = 121331346.

The previous prime is 121331339. The next prime is 121331381. The reversal of 121331347 is 743133121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121331347 - 2³ = 121331339 is a prime.

It is not a weakly prime, because it can be changed into another prime (121331387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665673 + 60665674.

It is an arithmetic number, because the mean of its divisors is an integer number (60665674).

Almost surely, 2^121331347 is an apocalyptic number.

121331347 is a deficient number, since it is larger than the sum of its proper divisors (1).

121331347 is an equidigital number, since it uses as much as digits as its factorization.

121331347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 121331347 is about 11015.0509304315. The cubic root of 121331347 is about 495.0598125186.

Adding to 121331347 its reverse (743133121), we get a palindrome (864464468).

The spelling of 121331347 in words is "one hundred twenty-one million, three hundred thirty-one thousand, three hundred forty-seven".