120021323544 has 24 divisors (see below), whose sum is σ = 325057751460. Its totient is φ = 40007107824.

The previous prime is 120021323519. The next prime is 120021323549. The reversal of 120021323544 is 445323120021.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021323549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 833481342 + ... + 833481485.

Almost surely, 2^120021323544 is an apocalyptic number.

It is an amenable number.

120021323544 is an abundant number, since it is smaller than the sum of its proper divisors (205036427916).

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

120021323544 is a wasteful number, since it uses less digits than its factorization.

120021323544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666962839 (or 1666962832 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 120021323544 its reverse (445323120021), we get a palindrome (565344443565).

The spelling of 120021323544 in words is "one hundred twenty billion, twenty-one million, three hundred twenty-three thousand, five hundred forty-four".