2111102020 has 12 divisors (see below), whose sum is σ = 4433314284. Its totient is φ = 844440800.

The previous prime is 2111102011. The next prime is 2111102029. The reversal of 2111102020 is 202011112.

It is an interprime number because it is at equal distance from previous prime (2111102011) and next prime (2111102029).

It can be written as a sum of positive squares in 2 ways, for example, as 1688059396 + 423042624 = 41086^2 + 20568^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2111101988 and 2111102006.

It is not an unprimeable number, because it can be changed into a prime (2111102029) 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 3 ways as a sum of consecutive naturals, for example, 52777531 + ... + 52777570.

It is an arithmetic number, because the mean of its divisors is an integer number (369442857).

Almost surely, 2^2111102020 is an apocalyptic number.

2111102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111102020 is an abundant number, since it is smaller than the sum of its proper divisors (2322212264).

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

2111102020 is a wasteful number, since it uses less digits than its factorization.

2111102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105555110 (or 105555108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2111102020 is about 45946.7302427496. The cubic root of 2111102020 is about 1282.8318689939.

Adding to 2111102020 its reverse (202011112), we get a palindrome (2313113132).

The spelling of 2111102020 in words is "two billion, one hundred eleven million, one hundred two thousand, twenty".