121880047 has 2 divisors, whose sum is σ = 121880048. Its totient is φ = 121880046.

The previous prime is 121880039. The next prime is 121880051. The reversal of 121880047 is 740088121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121880047 - 2³ = 121880039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121880147) 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, 60940023 + 60940024.

It is an arithmetic number, because the mean of its divisors is an integer number (60940024).

Almost surely, 2^121880047 is an apocalyptic number.

121880047 is a deficient number, since it is larger than the sum of its proper divisors (1).

121880047 is an equidigital number, since it uses as much as digits as its factorization.

121880047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 121880047 is about 11039.9296646310. The cubic root of 121880047 is about 495.8049644543.

The spelling of 121880047 in words is "one hundred twenty-one million, eight hundred eighty thousand, forty-seven".