2120011220 has 12 divisors (see below), whose sum is σ = 4452023604. Its totient is φ = 848004480.

The previous prime is 2120011217. The next prime is 2120011297. The reversal of 2120011220 is 221100212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 436057924 + 1683953296 = 20882^2 + 41036^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 53000261 + ... + 53000300.

It is an arithmetic number, because the mean of its divisors is an integer number (371001967).

Almost surely, 2^2120011220 is an apocalyptic number.

2120011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120011220 is an abundant number, since it is smaller than the sum of its proper divisors (2332012384).

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

2120011220 is a wasteful number, since it uses less digits than its factorization.

2120011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106000570 (or 106000568 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2120011220 is about 46043.5795741382. The cubic root of 2120011220 is about 1284.6339239926.

Adding to 2120011220 its reverse (221100212), we get a palindrome (2341111432).

The spelling of 2120011220 in words is "two billion, one hundred twenty million, eleven thousand, two hundred twenty".