121306242055 has 16 divisors (see below), whose sum is σ = 147101724000. Its totient is φ = 96022628352.

The previous prime is 121306242019. The next prime is 121306242067. The reversal of 121306242055 is 550242603121.

It is a cyclic number.

It is not a de Polignac number, because 121306242055 - 2³³ = 112716307463 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 2295571 + ... + 2347819.

It is an arithmetic number, because the mean of its divisors is an integer number (9193857750).

Almost surely, 2^121306242055 is an apocalyptic number.

121306242055 is a deficient number, since it is larger than the sum of its proper divisors (25795481945).

121306242055 is an equidigital number, since it uses as much as digits as its factorization.

121306242055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57138.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 121306242055 its reverse (550242603121), we get a palindrome (671548845176).

The spelling of 121306242055 in words is "one hundred twenty-one billion, three hundred six million, two hundred forty-two thousand, fifty-five".