121847755217420 has 24 divisors (see below), whose sum is σ = 255975302885904. Its totient is φ = 48721003624256.

The previous prime is 121847755217381. The next prime is 121847755217437. The reversal of 121847755217420 is 24712557748121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131098714 + ... + 1131206433.

It is an arithmetic number, because the mean of its divisors is an integer number (10665637620246).

Almost surely, 2^{121847755217420} is an apocalyptic number.

121847755217420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121847755217420 is an abundant number, since it is smaller than the sum of its proper divisors (134127547668484).

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

121847755217420 is a wasteful number, since it uses less digits than its factorization.

121847755217420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262307849 (or 2262307847 counting only the distinct ones).

The product of its (nonzero) digits is 8780800, while the sum is 56.

The spelling of 121847755217420 in words is "one hundred twenty-one trillion, eight hundred forty-seven billion, seven hundred fifty-five million, two hundred seventeen thousand, four hundred twenty".