121904029944 has 160 divisors (see below), whose sum is σ = 369130198800. Its totient is φ = 37455436800.

The previous prime is 121904029939. The next prime is 121904029993. The reversal of 121904029944 is 449920409121.

It is a happy number.

121904029944 is a `hidden beast` number, since 12 + 190 + 402 + 9 + 9 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 121904029944.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 321744 + ... + 589344.

Almost surely, 2^121904029944 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 121904029944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184565099400).

121904029944 is an abundant number, since it is smaller than the sum of its proper divisors (247226168856).

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

121904029944 is a wasteful number, since it uses less digits than its factorization.

121904029944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267675 (or 267662 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 121904029944 in words is "one hundred twenty-one billion, nine hundred four million, twenty-nine thousand, nine hundred forty-four".