2120155040 has 48 divisors (see below), whose sum is σ = 5091002280. Its totient is φ = 834155520.

The previous prime is 2120155039. The next prime is 2120155049. The reversal of 2120155040 is 405510212.

2120155040 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 474716944 + 1645438096 = 21788^2 + 40564^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2120155049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98855 + ... + 118374.

Almost surely, 2^2120155040 is an apocalyptic number.

2120155040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120155040 is an abundant number, since it is smaller than the sum of its proper divisors (2970847240).

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

2120155040 is a wasteful number, since it uses less digits than its factorization.

2120155040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217305 (or 217297 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2120155040 is about 46045.1413289176. The cubic root of 2120155040 is about 1284.6629728756.

Adding to 2120155040 its reverse (405510212), we get a palindrome (2525665252).

The spelling of 2120155040 in words is "two billion, one hundred twenty million, one hundred fifty-five thousand, forty".