121660407660750 has 128 divisors (see below), whose sum is σ = 347527690997760. Its totient is φ = 27769416249600.

The previous prime is 121660407660721. The next prime is 121660407660751. The reversal of 121660407660750 is 57066704066121.

It is a junction number, because it is equal to n+sod(n) for n = 121660407660693 and 121660407660702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121660407660751) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12340279 + ... + 19889778.

It is an arithmetic number, because the mean of its divisors is an integer number (2715060085920).

Almost surely, 2^{121660407660750} is an apocalyptic number.

121660407660750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121660407660750 is an abundant number, since it is smaller than the sum of its proper divisors (225867283337010).

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

121660407660750 is a wasteful number, since it uses less digits than its factorization.

121660407660750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32230803 (or 32230793 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 121660407660750 in words is "one hundred twenty-one trillion, six hundred sixty billion, four hundred seven million, six hundred sixty thousand, seven hundred fifty".