121805141 has 2 divisors, whose sum is σ = 121805142. Its totient is φ = 121805140.

The previous prime is 121805113. The next prime is 121805209. The reversal of 121805141 is 141508121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105370225 + 16434916 = 10265^2 + 4054^2 .

It is a cyclic number.

It is not a de Polignac number, because 121805141 - 2¹⁸ = 121542997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121805041) 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, 60902570 + 60902571.

It is an arithmetic number, because the mean of its divisors is an integer number (60902571).

Almost surely, 2^121805141 is an apocalyptic number.

It is an amenable number.

121805141 is a deficient number, since it is larger than the sum of its proper divisors (1).

121805141 is an equidigital number, since it uses as much as digits as its factorization.

121805141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 121805141 is about 11036.5366397253. The cubic root of 121805141 is about 495.7033717312.

The spelling of 121805141 in words is "one hundred twenty-one million, eight hundred five thousand, one hundred forty-one".