121545425149 has 2 divisors, whose sum is σ = 121545425150. Its totient is φ = 121545425148.

The previous prime is 121545425129. The next prime is 121545425207. The reversal of 121545425149 is 941524545121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107048061124 + 14497364025 = 327182^2 + 120405^2 .

It is an emirp because it is prime and its reverse (941524545121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121545425149 - 2⁷ = 121545425021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121545425129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60772712574 + 60772712575.

It is an arithmetic number, because the mean of its divisors is an integer number (60772712575).

Almost surely, 2^121545425149 is an apocalyptic number.

It is an amenable number.

121545425149 is a deficient number, since it is larger than the sum of its proper divisors (1).

121545425149 is an equidigital number, since it uses as much as digits as its factorization.

121545425149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 43.

The spelling of 121545425149 in words is "one hundred twenty-one billion, five hundred forty-five million, four hundred twenty-five thousand, one hundred forty-nine".