121755742713 has 96 divisors (see below), whose sum is σ = 199352380032. Its totient is φ = 70960665600.

The previous prime is 121755742711. The next prime is 121755742733. The reversal of 121755742713 is 317247557121.

121755742713 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 5 + 574 + 2 + 71 + 3 = 666.

It is not a de Polignac number, because 121755742713 - 2¹ = 121755742711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121755742711) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 166105695 + ... + 166106427.

It is an arithmetic number, because the mean of its divisors is an integer number (2076587292).

Almost surely, 2^121755742713 is an apocalyptic number.

It is an amenable number.

121755742713 is a deficient number, since it is larger than the sum of its proper divisors (77596637319).

121755742713 is a wasteful number, since it uses less digits than its factorization.

121755742713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1252 counting only the distinct ones).

The product of its digits is 411600, while the sum is 45.

It can be divided in two parts, 121755 and 742713, that added together give a palindrome (864468).

The spelling of 121755742713 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred forty-two thousand, seven hundred thirteen".