121775671 has 2 divisors, whose sum is σ = 121775672. Its totient is φ = 121775670.

The previous prime is 121775663. The next prime is 121775681. The reversal of 121775671 is 176577121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121775671 - 2³ = 121775663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121775671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121775681) 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, 60887835 + 60887836.

It is an arithmetic number, because the mean of its divisors is an integer number (60887836).

Almost surely, 2^121775671 is an apocalyptic number.

121775671 is a deficient number, since it is larger than the sum of its proper divisors (1).

121775671 is an equidigital number, since it uses as much as digits as its factorization.

121775671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20580, while the sum is 37.

The square root of 121775671 is about 11035.2014480933. The cubic root of 121775671 is about 495.6633910524.

The spelling of 121775671 in words is "one hundred twenty-one million, seven hundred seventy-five thousand, six hundred seventy-one".