121390948500 has 48 divisors (see below), whose sum is σ = 353490446400. Its totient is φ = 32370919200.

The previous prime is 121390948451. The next prime is 121390948577. The reversal of 121390948500 is 5849093121.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40462150 + ... + 40465149.

It is an arithmetic number, because the mean of its divisors is an integer number (7364384300).

Almost surely, 2^121390948500 is an apocalyptic number.

121390948500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121390948500 is an abundant number, since it is smaller than the sum of its proper divisors (232099497900).

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

121390948500 is a wasteful number, since it uses less digits than its factorization.

121390948500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80927321 (or 80927309 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 121390948500 in words is "one hundred twenty-one billion, three hundred ninety million, nine hundred forty-eight thousand, five hundred".