121871708380 has 24 divisors (see below), whose sum is σ = 256403679840. Its totient is φ = 48658570560.

The previous prime is 121871708327. The next prime is 121871708381. The reversal of 121871708380 is 83807178121.

It is a self number, because there is not a number n which added to its sum of digits gives 121871708380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121871708381) 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 7 ways as a sum of consecutive naturals, for example, 5620960 + ... + 5642599.

It is an arithmetic number, because the mean of its divisors is an integer number (10683486660).

Almost surely, 2^121871708380 is an apocalyptic number.

121871708380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121871708380 is an abundant number, since it is smaller than the sum of its proper divisors (134531971460).

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

121871708380 is a wasteful number, since it uses less digits than its factorization.

121871708380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11264109 (or 11264107 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 46.

The spelling of 121871708380 in words is "one hundred twenty-one billion, eight hundred seventy-one million, seven hundred eight thousand, three hundred eighty".