121650000180 has 48 divisors (see below), whose sum is σ = 344931659520. Its totient is φ = 32029365888.

The previous prime is 121650000163. The next prime is 121650000181. The reversal of 121650000180 is 81000056121.

It is a self number, because there is not a number n which added to its sum of digits gives 121650000180.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121650000181) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12827539 + ... + 12837018.

It is an arithmetic number, because the mean of its divisors is an integer number (7186076240).

Almost surely, 2^121650000180 is an apocalyptic number.

121650000180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121650000180 is an abundant number, since it is smaller than the sum of its proper divisors (223281659340).

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

121650000180 is a wasteful number, since it uses less digits than its factorization.

121650000180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25664648 (or 25664646 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The spelling of 121650000180 in words is "one hundred twenty-one billion, six hundred fifty million, one hundred eighty", and thus it is an aban number.