121889730843 has 48 divisors (see below), whose sum is σ = 183967524000. Its totient is φ = 77671931904.

The previous prime is 121889730827. The next prime is 121889730857. The reversal of 121889730843 is 348037988121.

It is a happy number.

121889730843 is a `hidden beast` number, since 1 + 218 + 89 + 7 + 308 + 43 = 666.

It is not a de Polignac number, because 121889730843 - 2⁴ = 121889730827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121889730843.

It is not an unprimeable number, because it can be changed into a prime (121889730343) 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 47 ways as a sum of consecutive naturals, for example, 10692955 + ... + 10704347.

It is an arithmetic number, because the mean of its divisors is an integer number (3832656750).

Almost surely, 2^121889730843 is an apocalyptic number.

121889730843 is a deficient number, since it is larger than the sum of its proper divisors (62077793157).

121889730843 is a wasteful number, since it uses less digits than its factorization.

121889730843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11836 (or 11833 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 121889730843 in words is "one hundred twenty-one billion, eight hundred eighty-nine million, seven hundred thirty thousand, eight hundred forty-three".