121320102000000 has 448 divisors, whose sum is σ = 403231119825600. Its totient is φ = 32318649600000.

The previous prime is 121320101999963. The next prime is 121320102000043. The reversal of 121320102000000 is 201023121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 121320102000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 6113990079 + ... + 6114009921.

Almost surely, 2^{121320102000000} is an apocalyptic number.

121320102000000 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 121320102000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201615559912800).

121320102000000 is an abundant number, since it is smaller than the sum of its proper divisors (281911017825600).

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

121320102000000 is an frugal number, since it uses more digits than its factorization.

121320102000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20909 (or 20872 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 121320102000000 its reverse (201023121), we get a palindrome (121320303023121).

The spelling of 121320102000000 in words is "one hundred twenty-one trillion, three hundred twenty billion, one hundred two million", and thus it is an aban number.