121755370117 has 8 divisors (see below), whose sum is σ = 122095969272. Its totient is φ = 121415198400.

The previous prime is 121755370103. The next prime is 121755370127. The reversal of 121755370117 is 711073557121.

It can be written as a sum of positive squares in 4 ways, for example, as 2519136481 + 119236233636 = 50191^2 + 345306^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121755370117 - 2³¹ = 119607886469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121755370117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121755370127) 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 7 ways as a sum of consecutive naturals, for example, 467943 + ... + 680059.

It is an arithmetic number, because the mean of its divisors is an integer number (15261996159).

Almost surely, 2^121755370117 is an apocalyptic number.

It is an amenable number.

121755370117 is a deficient number, since it is larger than the sum of its proper divisors (340599155).

121755370117 is a wasteful number, since it uses less digits than its factorization.

121755370117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213719.

The product of its (nonzero) digits is 51450, while the sum is 40.

The spelling of 121755370117 in words is "one hundred twenty-one billion, seven hundred fifty-five million, three hundred seventy thousand, one hundred seventeen".