121579928047 has 2 divisors, whose sum is σ = 121579928048. Its totient is φ = 121579928046.

The previous prime is 121579928009. The next prime is 121579928069. The reversal of 121579928047 is 740829975121.

It is a strong prime.

It is an emirp because it is prime and its reverse (740829975121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121579928047 - 2¹⁵ = 121579895279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121579928747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60789964023 + 60789964024.

It is an arithmetic number, because the mean of its divisors is an integer number (60789964024).

Almost surely, 2^121579928047 is an apocalyptic number.

121579928047 is a deficient number, since it is larger than the sum of its proper divisors (1).

121579928047 is an equidigital number, since it uses as much as digits as its factorization.

121579928047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 121579928047 in words is "one hundred twenty-one billion, five hundred seventy-nine million, nine hundred twenty-eight thousand, forty-seven".