120981665424 has 80 divisors (see below), whose sum is σ = 319724873600. Its totient is φ = 39409763328.

The previous prime is 120981665423. The next prime is 120981665471. The reversal of 120981665424 is 424566189021.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (120981665423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223557 + ... + 540315.

It is an arithmetic number, because the mean of its divisors is an integer number (3996560920).

Almost surely, 2^120981665424 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 120981665424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159862436800).

120981665424 is an abundant number, since it is smaller than the sum of its proper divisors (198743208176).

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

120981665424 is a wasteful number, since it uses less digits than its factorization.

120981665424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316952 (or 316946 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 120981665424 in words is "one hundred twenty billion, nine hundred eighty-one million, six hundred sixty-five thousand, four hundred twenty-four".