121541123017 has 2 divisors, whose sum is σ = 121541123018. Its totient is φ = 121541123016.

The previous prime is 121541122951. The next prime is 121541123023. The reversal of 121541123017 is 710321145121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107250355081 + 14290767936 = 327491^2 + 119544^2 .

It is a cyclic number.

It is not a de Polignac number, because 121541123017 - 2²⁷ = 121406905289 is a prime.

It is not a weakly prime, because it can be changed into another prime (121541123317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60770561508 + 60770561509.

It is an arithmetic number, because the mean of its divisors is an integer number (60770561509).

Almost surely, 2^121541123017 is an apocalyptic number.

It is an amenable number.

121541123017 is a deficient number, since it is larger than the sum of its proper divisors (1).

121541123017 is an equidigital number, since it uses as much as digits as its factorization.

121541123017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 121541123017 its reverse (710321145121), we get a palindrome (831862268138).

The spelling of 121541123017 in words is "one hundred twenty-one billion, five hundred forty-one million, one hundred twenty-three thousand, seventeen".