121943171328 has 144 divisors (see below), whose sum is σ = 365472694272. Its totient is φ = 35760384000.

The previous prime is 121943171243. The next prime is 121943171341. The reversal of 121943171328 is 823171349121.

It is a super-2 number, since 2×121943171328² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121943171328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29073 + ... + 494703.

Almost surely, 2^121943171328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121943171328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182736347136).

121943171328 is an abundant number, since it is smaller than the sum of its proper divisors (243529522944).

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

121943171328 is a wasteful number, since it uses less digits than its factorization.

121943171328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465692 (or 465678 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The spelling of 121943171328 in words is "one hundred twenty-one billion, nine hundred forty-three million, one hundred seventy-one thousand, three hundred twenty-eight".