121375559 has 2 divisors, whose sum is σ = 121375560. Its totient is φ = 121375558.

The previous prime is 121375547. The next prime is 121375603. The reversal of 121375559 is 955573121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121375559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121375519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60687779 + 60687780.

It is an arithmetic number, because the mean of its divisors is an integer number (60687780).

Almost surely, 2^121375559 is an apocalyptic number.

121375559 is a deficient number, since it is larger than the sum of its proper divisors (1).

121375559 is an equidigital number, since it uses as much as digits as its factorization.

121375559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47250, while the sum is 38.

The square root of 121375559 is about 11017.0576380447. The cubic root of 121375559 is about 495.1199369272.

The spelling of 121375559 in words is "one hundred twenty-one million, three hundred seventy-five thousand, five hundred fifty-nine".