121808697077760 has 832 divisors, whose sum is σ = 501585038475264. Its totient is φ = 24494388019200.

The previous prime is 121808697077681. The next prime is 121808697077803. The reversal of 121808697077760 is 67770796808121.

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 63 ways as a sum of consecutive naturals, for example, 146241997 + ... + 147072563.

Almost surely, 2^{121808697077760} is an apocalyptic number.

121808697077760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121808697077760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250792519237632).

121808697077760 is an abundant number, since it is smaller than the sum of its proper divisors (379776341397504).

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

121808697077760 is a wasteful number, since it uses less digits than its factorization.

121808697077760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830648 (or 830626 counting only the distinct ones).

The product of its (nonzero) digits is 99574272, while the sum is 69.

The spelling of 121808697077760 in words is "one hundred twenty-one trillion, eight hundred eight billion, six hundred ninety-seven million, seventy-seven thousand, seven hundred sixty".