121546012445729 has 2 divisors, whose sum is σ = 121546012445730. Its totient is φ = 121546012445728.

The previous prime is 121546012445707. The next prime is 121546012445731. The reversal of 121546012445729 is 927544210645121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116512486869025 + 5033525576704 = 10794095^2 + 2243552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121546012445729 is a prime.

Together with 121546012445731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121546012445129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60773006222864 + 60773006222865.

It is an arithmetic number, because the mean of its divisors is an integer number (60773006222865).

Almost surely, 2^{121546012445729} is an apocalyptic number.

It is an amenable number.

121546012445729 is a deficient number, since it is larger than the sum of its proper divisors (1).

121546012445729 is an equidigital number, since it uses as much as digits as its factorization.

121546012445729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 121546012445729 in words is "one hundred twenty-one trillion, five hundred forty-six billion, twelve million, four hundred forty-five thousand, seven hundred twenty-nine".