120040021240 has 64 divisors (see below), whose sum is σ = 288160947360. Its totient is φ = 44846530560.

The previous prime is 120040021201. The next prime is 120040021247. The reversal of 120040021240 is 42120040021.

It is a super-2 number, since 2×120040021240² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120040021247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584697 + ... + 762856.

Almost surely, 2^120040021240 is an apocalyptic number.

120040021240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120040021240 is an abundant number, since it is smaller than the sum of its proper divisors (168120926120).

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

120040021240 is a wasteful number, since it uses less digits than its factorization.

120040021240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347712 (or 1347708 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 120040021240 its reverse (42120040021), we get a palindrome (162160061261).

The spelling of 120040021240 in words is "one hundred twenty billion, forty million, twenty-one thousand, two hundred forty".