121002320320 has 112 divisors (see below), whose sum is σ = 329722398720. Its totient is φ = 41433191424.

The previous prime is 121002320311. The next prime is 121002320321. The reversal of 121002320320 is 23023200121.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 121002320294 and 121002320303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002320321) 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, 1728561 + ... + 1797199.

Almost surely, 2^121002320320 is an apocalyptic number.

121002320320 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 121002320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164861199360).

121002320320 is an abundant number, since it is smaller than the sum of its proper divisors (208720078400).

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

121002320320 is an equidigital number, since it uses as much as digits as its factorization.

121002320320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69450 (or 69440 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 121002320320 its reverse (23023200121), we get a palindrome (144025520441).

The spelling of 121002320320 in words is "one hundred twenty-one billion, two million, three hundred twenty thousand, three hundred twenty".