121505141 has 2 divisors, whose sum is σ = 121505142. Its totient is φ = 121505140.

The previous prime is 121505101. The next prime is 121505147. The reversal of 121505141 is 141505121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120340900 + 1164241 = 10970^2 + 1079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121505141 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121505147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60752570 + 60752571.

It is an arithmetic number, because the mean of its divisors is an integer number (60752571).

Almost surely, 2^121505141 is an apocalyptic number.

It is an amenable number.

121505141 is a deficient number, since it is larger than the sum of its proper divisors (1).

121505141 is an equidigital number, since it uses as much as digits as its factorization.

121505141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 121505141 is about 11022.9370405532. The cubic root of 121505141 is about 495.2960729180.

Subtracting from 121505141 its sum of digits (20), we obtain a palindrome (121505121).

The spelling of 121505141 in words is "one hundred twenty-one million, five hundred five thousand, one hundred forty-one".