121878281280 has 224 divisors, whose sum is σ = 443527013376. Its totient is φ = 27777079296.

The previous prime is 121878281249. The next prime is 121878281323. The reversal of 121878281280 is 82182878121.

It is a happy number.

121878281280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2305707 + ... + 2357973.

Almost surely, 2^121878281280 is an apocalyptic number.

121878281280 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 121878281280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221763506688).

121878281280 is an abundant number, since it is smaller than the sum of its proper divisors (321648732096).

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

121878281280 is a wasteful number, since it uses less digits than its factorization.

121878281280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52641 (or 52631 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 48.

The spelling of 121878281280 in words is "one hundred twenty-one billion, eight hundred seventy-eight million, two hundred eighty-one thousand, two hundred eighty".