121404347 has 2 divisors, whose sum is σ = 121404348. Its totient is φ = 121404346.

The previous prime is 121404313. The next prime is 121404377. The reversal of 121404347 is 743404121.

It is a strong prime.

It is an emirp because it is prime and its reverse (743404121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121404347 is a prime.

It is equal to p_6917012 and since 121404347 and 6917012 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (121404377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60702173 + 60702174.

It is an arithmetic number, because the mean of its divisors is an integer number (60702174).

Almost surely, 2^121404347 is an apocalyptic number.

121404347 is a deficient number, since it is larger than the sum of its proper divisors (1).

121404347 is an equidigital number, since it uses as much as digits as its factorization.

121404347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 121404347 is about 11018.3640800257. The cubic root of 121404347 is about 495.1590782121.

Adding to 121404347 its reverse (743404121), we get a palindrome (864808468).

The spelling of 121404347 in words is "one hundred twenty-one million, four hundred four thousand, three hundred forty-seven".