121002020320 has 96 divisors (see below), whose sum is σ = 287285999616. Its totient is φ = 48161088000.

The previous prime is 121002020291. The next prime is 121002020327. The reversal of 121002020320 is 23020200121.

It is a self number, because there is not a number n which added to its sum of digits gives 121002020320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002020327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51467145 + ... + 51469495.

It is an arithmetic number, because the mean of its divisors is an integer number (2992562496).

Almost surely, 2^121002020320 is an apocalyptic number.

121002020320 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 121002020320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143642999808).

121002020320 is an abundant number, since it is smaller than the sum of its proper divisors (166283979296).

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

121002020320 is a wasteful number, since it uses less digits than its factorization.

121002020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 121002020320 its reverse (23020200121), we get a palindrome (144022220441).

The spelling of 121002020320 in words is "one hundred twenty-one billion, two million, twenty thousand, three hundred twenty".