2111202220 has 12 divisors (see below), whose sum is σ = 4433524704. Its totient is φ = 844480880.

The previous prime is 2111202209. The next prime is 2111202221. The reversal of 2111202220 is 222021112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111202220.

It is not an unprimeable number, because it can be changed into a prime (2111202221) 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 3 ways as a sum of consecutive naturals, for example, 52780036 + ... + 52780075.

It is an arithmetic number, because the mean of its divisors is an integer number (369460392).

Almost surely, 2^2111202220 is an apocalyptic number.

2111202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111202220 is an abundant number, since it is smaller than the sum of its proper divisors (2322322484).

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

2111202220 is a wasteful number, since it uses less digits than its factorization.

2111202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105560120 (or 105560118 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2111202220 is about 45947.8206229632. The cubic root of 2111202220 is about 1282.8521645108.

Adding to 2111202220 its reverse (222021112), we get a palindrome (2333223332).

The spelling of 2111202220 in words is "two billion, one hundred eleven million, two hundred two thousand, two hundred twenty".