2120201220 has 24 divisors (see below), whose sum is σ = 5936563584. Its totient is φ = 565386976.

The previous prime is 2120201179. The next prime is 2120201221. The reversal of 2120201220 is 221020212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2120201196 and 2120201205.

It is not an unprimeable number, because it can be changed into a prime (2120201221) 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 7 ways as a sum of consecutive naturals, for example, 17668284 + ... + 17668403.

It is an arithmetic number, because the mean of its divisors is an integer number (247356816).

Almost surely, 2^2120201220 is an apocalyptic number.

2120201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120201220 is an abundant number, since it is smaller than the sum of its proper divisors (3816362364).

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

2120201220 is a wasteful number, since it uses less digits than its factorization.

2120201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35336699 (or 35336697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2120201220 is about 46045.6427906051. The cubic root of 2120201220 is about 1284.6723000716.

Adding to 2120201220 its reverse (221020212), we get a palindrome (2341221432).

The spelling of 2120201220 in words is "two billion, one hundred twenty million, two hundred one thousand, two hundred twenty".