2111443220 has 12 divisors (see below), whose sum is σ = 4434030804. Its totient is φ = 844577280.

The previous prime is 2111443211. The next prime is 2111443237. The reversal of 2111443220 is 223441112.

It can be written as a sum of positive squares in 2 ways, for example, as 491863684 + 1619579536 = 22178^2 + 40244^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 105572161 = 2111443220 / (2 + 1 + 1 + 1 + 4 + 4 + 3 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2111443192 and 2111443201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52786061 + ... + 52786100.

It is an arithmetic number, because the mean of its divisors is an integer number (369502567).

Almost surely, 2^2111443220 is an apocalyptic number.

2111443220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111443220 is an abundant number, since it is smaller than the sum of its proper divisors (2322587584).

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

2111443220 is a wasteful number, since it uses less digits than its factorization.

2111443220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105572170 (or 105572168 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2111443220 is about 45950.4430881792. The cubic root of 2111443220 is about 1282.9009764476.

Adding to 2111443220 its reverse (223441112), we get a palindrome (2334884332).

The spelling of 2111443220 in words is "two billion, one hundred eleven million, four hundred forty-three thousand, two hundred twenty".