121531159 has 2 divisors, whose sum is σ = 121531160. Its totient is φ = 121531158.

The previous prime is 121531153. The next prime is 121531171. The reversal of 121531159 is 951135121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121531159 - 2⁵ = 121531127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121531153) 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, 60765579 + 60765580.

It is an arithmetic number, because the mean of its divisors is an integer number (60765580).

Almost surely, 2^121531159 is an apocalyptic number.

121531159 is a deficient number, since it is larger than the sum of its proper divisors (1).

121531159 is an equidigital number, since it uses as much as digits as its factorization.

121531159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 28.

The square root of 121531159 is about 11024.1171528608. The cubic root of 121531159 is about 495.3314231191.

The spelling of 121531159 in words is "one hundred twenty-one million, five hundred thirty-one thousand, one hundred fifty-nine".