121405340000 has 540 divisors, whose sum is σ = 361015597404. Its totient is φ = 40049856000.

The previous prime is 121405339997. The next prime is 121405340009. The reversal of 121405340000 is 43504121.

121405340000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121405340009) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 1812019967 + ... + 1812020033.

Almost surely, 2^121405340000 is an apocalyptic number.

121405340000 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 121405340000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180507798702).

121405340000 is an abundant number, since it is smaller than the sum of its proper divisors (239610257404).

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

121405340000 is an frugal number, since it uses more digits than its factorization.

121405340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 121405340000 its reverse (43504121), we get a palindrome (121448844121).

The spelling of 121405340000 in words is "one hundred twenty-one billion, four hundred five million, three hundred forty thousand".