2120120440 has 32 divisors (see below), whose sum is σ = 4795004880. Its totient is φ = 843651072.

The previous prime is 2120120423. The next prime is 2120120441. The reversal of 2120120440 is 440210212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120120441) 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 7 ways as a sum of consecutive naturals, for example, 129594 + ... + 145033.

Almost surely, 2^2120120440 is an apocalyptic number.

2120120440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120120440 is an abundant number, since it is smaller than the sum of its proper divisors (2674884440).

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

2120120440 is a wasteful number, since it uses less digits than its factorization.

2120120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274831 (or 274827 counting only the distinct ones).

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

The square root of 2120120440 is about 46044.7656091330. The cubic root of 2120120440 is about 1284.6559844589.

Adding to 2120120440 its reverse (440210212), we get a palindrome (2560330652).

The spelling of 2120120440 in words is "two billion, one hundred twenty million, one hundred twenty thousand, four hundred forty".