121869256780 has 48 divisors (see below), whose sum is σ = 259335659520. Its totient is φ = 48098950848.

The previous prime is 121869256721. The next prime is 121869256801. The reversal of 121869256780 is 87652968121.

It is a happy number.

121869256780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2451249 + ... + 2500471.

It is an arithmetic number, because the mean of its divisors is an integer number (5402826240).

Almost surely, 2^121869256780 is an apocalyptic number.

121869256780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121869256780 is an abundant number, since it is smaller than the sum of its proper divisors (137466402740).

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

121869256780 is a wasteful number, since it uses less digits than its factorization.

121869256780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50878 (or 50876 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 121869256780 in words is "one hundred twenty-one billion, eight hundred sixty-nine million, two hundred fifty-six thousand, seven hundred eighty".