121439860915077 has 12 divisors (see below), whose sum is σ = 179691501517164. Its totient is φ = 78985275391680.

The previous prime is 121439860915039. The next prime is 121439860915103. The reversal of 121439860915077 is 770519068934121.

121439860915077 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 3 + 9 + 8 + 609 + 15 + 0 + 7 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56908827914436 + 64531033000641 = 7543794^2 + 8033121^2 .

It is not a de Polignac number, because 121439860915077 - 2⁷ = 121439860914949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121439860911077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164552656698 + ... + 164552657435.

It is an arithmetic number, because the mean of its divisors is an integer number (14974291793097).

It is a 1-persistent number, because it is pandigital, but 2⋅121439860915077 = 242879721830154 is not.

Almost surely, 2^{121439860915077} is an apocalyptic number.

It is an amenable number.

121439860915077 is a deficient number, since it is larger than the sum of its proper divisors (58251640602087).

121439860915077 is a wasteful number, since it uses less digits than its factorization.

121439860915077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329105314180 (or 329105314177 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 121439860915077 in words is "one hundred twenty-one trillion, four hundred thirty-nine billion, eight hundred sixty million, nine hundred fifteen thousand, seventy-seven".