121841947 has 2 divisors, whose sum is σ = 121841948. Its totient is φ = 121841946.

The previous prime is 121841897. The next prime is 121841959. The reversal of 121841947 is 749148121.

It is a strong prime.

It is an emirp because it is prime and its reverse (749148121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121841947 - 2¹¹ = 121839899 is a prime.

It is not a weakly prime, because it can be changed into another prime (121841977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60920973 + 60920974.

It is an arithmetic number, because the mean of its divisors is an integer number (60920974).

Almost surely, 2^121841947 is an apocalyptic number.

121841947 is a deficient number, since it is larger than the sum of its proper divisors (1).

121841947 is an equidigital number, since it uses as much as digits as its factorization.

121841947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 121841947 is about 11038.2039752851. The cubic root of 121841947 is about 495.7532957896.

The spelling of 121841947 in words is "one hundred twenty-one million, eight hundred forty-one thousand, nine hundred forty-seven".