121340422500 has 480 divisors, whose sum is σ = 409337470080. Its totient is φ = 27686400000.

The previous prime is 121340422457. The next prime is 121340422501. The reversal of 121340422500 is 5224043121.

It is not an unprimeable number, because it can be changed into a prime (121340422501) by changing a digit.

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 159 ways as a sum of consecutive naturals, for example, 98091882 + ... + 98093118.

It is an arithmetic number, because the mean of its divisors is an integer number (852786396).

Almost surely, 2^121340422500 is an apocalyptic number.

121340422500 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 121340422500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204668735040).

121340422500 is an abundant number, since it is smaller than the sum of its proper divisors (287997047580).

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

121340422500 is a wasteful number, since it uses less digits than its factorization.

121340422500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 121340422500 its reverse (5224043121), we get a palindrome (126564465621).

The spelling of 121340422500 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty-two thousand, five hundred".