2120865120 has 768 divisors, whose sum is σ = 8926848000. Its totient is φ = 470292480.

The previous prime is 2120865113. The next prime is 2120865127. The reversal of 2120865120 is 215680212.

It is a happy number.

2120865120 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 8 + 651 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2120865113) and next prime (2120865127).

It is a super-2 number, since 2×2120865120² = 8996137714465228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120865127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 73133266 + ... + 73133294.

It is an arithmetic number, because the mean of its divisors is an integer number (11623500).

Almost surely, 2^2120865120 is an apocalyptic number.

2120865120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120865120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4463424000).

2120865120 is an abundant number, since it is smaller than the sum of its proper divisors (6805982880).

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

2120865120 is a wasteful number, since it uses less digits than its factorization.

2120865120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2120865120 is about 46052.8513775206. The cubic root of 2120865120 is about 1284.8063761717.

The spelling of 2120865120 in words is "two billion, one hundred twenty million, eight hundred sixty-five thousand, one hundred twenty".