121755742776 has 48 divisors (see below), whose sum is σ = 330021954600. Its totient is φ = 40552408512.

The previous prime is 121755742747. The next prime is 121755742777. The reversal of 121755742776 is 677247557121.

121755742776 is a `hidden beast` number, since 1 + 2 + 17 + 557 + 4 + 2 + 7 + 76 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755742777) 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 in 11 ways as a sum of consecutive naturals, for example, 594466 + ... + 772593.

Almost surely, 2^121755742776 is an apocalyptic number.

It is an amenable number.

121755742776 is an abundant number, since it is smaller than the sum of its proper divisors (208266211824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121755742776 is a wasteful number, since it uses less digits than its factorization.

121755742776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368308 (or 1368301 counting only the distinct ones).

The product of its digits is 5762400, while the sum is 54.

The spelling of 121755742776 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred forty-two thousand, seven hundred seventy-six".