121789143000 has 512 divisors, whose sum is σ = 485114572800. Its totient is φ = 27687744000.

The previous prime is 121789142989. The next prime is 121789143019. The reversal of 121789143000 is 341987121.

It is a happy number.

121789143000 is a `hidden beast` number, since 1 + 217 + 8 + 9 + 1 + 430 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 37231365 + ... + 37234635.

It is an arithmetic number, because the mean of its divisors is an integer number (947489400).

Almost surely, 2^121789143000 is an apocalyptic number.

121789143000 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 121789143000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242557286400).

121789143000 is an abundant number, since it is smaller than the sum of its proper divisors (363325429800).

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

121789143000 is a wasteful number, since it uses less digits than its factorization.

121789143000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505 (or 3485 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 121789143000 in words is "one hundred twenty-one billion, seven hundred eighty-nine million, one hundred forty-three thousand".