121605271 has 2 divisors, whose sum is σ = 121605272. Its totient is φ = 121605270.

The previous prime is 121605251. The next prime is 121605287. The reversal of 121605271 is 172506121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121605271 - 2⁹ = 121604759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121605251) 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, 60802635 + 60802636.

It is an arithmetic number, because the mean of its divisors is an integer number (60802636).

Almost surely, 2^121605271 is an apocalyptic number.

121605271 is a deficient number, since it is larger than the sum of its proper divisors (1).

121605271 is an equidigital number, since it uses as much as digits as its factorization.

121605271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 121605271 is about 11027.4779981644. The cubic root of 121605271 is about 495.4320901500.

The spelling of 121605271 in words is "one hundred twenty-one million, six hundred five thousand, two hundred seventy-one".