121755716761 has 8 divisors (see below), whose sum is σ = 146473042880. Its totient is φ = 98869303728.

The previous prime is 121755716759. The next prime is 121755716807. The reversal of 121755716761 is 167617557121.

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 121755716761 - 2¹ = 121755716759 is a prime.

It is a super-2 number, since 2×121755716761² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121755716741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457728126 + ... + 457728391.

It is an arithmetic number, because the mean of its divisors is an integer number (18309130360).

Almost surely, 2^121755716761 is an apocalyptic number.

It is an amenable number.

121755716761 is a deficient number, since it is larger than the sum of its proper divisors (24717326119).

121755716761 is an equidigital number, since it uses as much as digits as its factorization.

121755716761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915456543.

The product of its digits is 617400, while the sum is 49.

The spelling of 121755716761 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred sixteen thousand, seven hundred sixty-one".