121241646320 has 80 divisors (see below), whose sum is σ = 296927796000. Its totient is φ = 45912489984.

The previous prime is 121241646293. The next prime is 121241646343. The reversal of 121241646320 is 23646142121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2236496 + ... + 2290064.

It is an arithmetic number, because the mean of its divisors is an integer number (3711597450).

Almost surely, 2^121241646320 is an apocalyptic number.

121241646320 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 121241646320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148463898000).

121241646320 is an abundant number, since it is smaller than the sum of its proper divisors (175686149680).

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

121241646320 is a wasteful number, since it uses less digits than its factorization.

121241646320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55090 (or 55084 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 121241646320 its reverse (23646142121), we get a palindrome (144887788441).

The spelling of 121241646320 in words is "one hundred twenty-one billion, two hundred forty-one million, six hundred forty-six thousand, three hundred twenty".