121177810145 has 16 divisors (see below), whose sum is σ = 170240047488. Its totient is φ = 81066687360.

The previous prime is 121177810087. The next prime is 121177810183. The reversal of 121177810145 is 541018771121.

It is not a de Polignac number, because 121177810145 - 2¹⁸ = 121177548001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121177810099 and 121177810108.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 42220799 + ... + 42223668.

It is an arithmetic number, because the mean of its divisors is an integer number (10640002968).

Almost surely, 2^121177810145 is an apocalyptic number.

It is an amenable number.

121177810145 is a deficient number, since it is larger than the sum of its proper divisors (49062237343).

121177810145 is an equidigital number, since it uses as much as digits as its factorization.

121177810145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84444520.

The product of its (nonzero) digits is 15680, while the sum is 38.

The spelling of 121177810145 in words is "one hundred twenty-one billion, one hundred seventy-seven million, eight hundred ten thousand, one hundred forty-five".