121543054579 has 2 divisors, whose sum is σ = 121543054580. Its totient is φ = 121543054578.

The previous prime is 121543054481. The next prime is 121543054583. The reversal of 121543054579 is 975450345121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121543054579 - 2¹⁵ = 121543021811 is a prime.

It is not a weakly prime, because it can be changed into another prime (121543054379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60771527289 + 60771527290.

It is an arithmetic number, because the mean of its divisors is an integer number (60771527290).

Almost surely, 2^121543054579 is an apocalyptic number.

121543054579 is a deficient number, since it is larger than the sum of its proper divisors (1).

121543054579 is an equidigital number, since it uses as much as digits as its factorization.

121543054579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 121543054579 in words is "one hundred twenty-one billion, five hundred forty-three million, fifty-four thousand, five hundred seventy-nine".