121345559 has 2 divisors, whose sum is σ = 121345560. Its totient is φ = 121345558.

The previous prime is 121345519. The next prime is 121345561. The reversal of 121345559 is 955543121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121345559 - 2²⁰ = 120296983 is a prime.

Together with 121345561, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121345519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60672779 + 60672780.

It is an arithmetic number, because the mean of its divisors is an integer number (60672780).

Almost surely, 2^121345559 is an apocalyptic number.

121345559 is a deficient number, since it is larger than the sum of its proper divisors (1).

121345559 is an equidigital number, since it uses as much as digits as its factorization.

121345559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 35.

The square root of 121345559 is about 11015.6960288490. The cubic root of 121345559 is about 495.0791411740.

The spelling of 121345559 in words is "one hundred twenty-one million, three hundred forty-five thousand, five hundred fifty-nine".