121481609220 has 48 divisors (see below), whose sum is σ = 377942785920. Its totient is φ = 32395095648.

The previous prime is 121481609213. The next prime is 121481609279. The reversal of 121481609220 is 22906184121.

121481609220 is a `hidden beast` number, since 1 + 2 + 1 + 48 + 1 + 609 + 2 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112482432 + ... + 112483511.

It is an arithmetic number, because the mean of its divisors is an integer number (7873808040).

Almost surely, 2^121481609220 is an apocalyptic number.

121481609220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121481609220 is an abundant number, since it is smaller than the sum of its proper divisors (256461176700).

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

121481609220 is a wasteful number, since it uses less digits than its factorization.

121481609220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224965961 (or 224965953 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 121481609220 in words is "one hundred twenty-one billion, four hundred eighty-one million, six hundred nine thousand, two hundred twenty".