121521344300 has 72 divisors (see below), whose sum is σ = 265411106352. Its totient is φ = 48294400000.

The previous prime is 121521344297. The next prime is 121521344311. The reversal of 121521344300 is 3443125121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121521344300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9913175 + ... + 9925425.

It is an arithmetic number, because the mean of its divisors is an integer number (3686265366).

Almost surely, 2^121521344300 is an apocalyptic number.

121521344300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121521344300 is an abundant number, since it is smaller than the sum of its proper divisors (143889762052).

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

121521344300 is a wasteful number, since it uses less digits than its factorization.

121521344300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12899 (or 12892 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 121521344300 its reverse (3443125121), we get a palindrome (124964469421).

The spelling of 121521344300 in words is "one hundred twenty-one billion, five hundred twenty-one million, three hundred forty-four thousand, three hundred".