121663839360 has 128 divisors (see below), whose sum is σ = 443204035200. Its totient is φ = 27808874496.

The previous prime is 121663839347. The next prime is 121663839371. The reversal of 121663839360 is 63938366121.

It is a tau number, because it is divible by the number of its divisors (128).

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 15 ways as a sum of consecutive naturals, for example, 4512745 + ... + 4539624.

It is an arithmetic number, because the mean of its divisors is an integer number (3462531525).

Almost surely, 2^121663839360 is an apocalyptic number.

121663839360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121663839360 is an abundant number, since it is smaller than the sum of its proper divisors (321540195840).

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

121663839360 is an equidigital number, since it uses as much as digits as its factorization.

121663839360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9052398 (or 9052386 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 121663839360 in words is "one hundred twenty-one billion, six hundred sixty-three million, eight hundred thirty-nine thousand, three hundred sixty".