121755742415 has 8 divisors (see below), whose sum is σ = 154701414000. Its totient is φ = 91674911872.

The previous prime is 121755742379. The next prime is 121755742421. The reversal of 121755742415 is 514247557121.

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 121755742415 - 2²⁶ = 121688633551 is a prime.

It is a super-2 number, since 2×121755742415² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716210165 + ... + 716210334.

It is an arithmetic number, because the mean of its divisors is an integer number (19337676750).

Almost surely, 2^121755742415 is an apocalyptic number.

121755742415 is a deficient number, since it is larger than the sum of its proper divisors (32945671585).

121755742415 is a wasteful number, since it uses less digits than its factorization.

121755742415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432420521.

The product of its digits is 392000, while the sum is 44.

The spelling of 121755742415 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred forty-two thousand, four hundred fifteen".