2111202020 has 24 divisors (see below), whose sum is σ = 4474963584. Its totient is φ = 836587616.

The previous prime is 2111202017. The next prime is 2111202029. The reversal of 2111202020 is 202021112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2111201992 and 2111202010.

It is not an unprimeable number, because it can be changed into a prime (2111202029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491132 + ... + 495411.

It is an arithmetic number, because the mean of its divisors is an integer number (186456816).

Almost surely, 2^2111202020 is an apocalyptic number.

2111202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111202020 is an abundant number, since it is smaller than the sum of its proper divisors (2363761564).

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

2111202020 is a wasteful number, since it uses less digits than its factorization.

2111202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986659 (or 986657 counting only the distinct ones).

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

The square root of 2111202020 is about 45947.8184465813. The cubic root of 2111202020 is about 1282.8521240014.

Adding to 2111202020 its reverse (202021112), we get a palindrome (2313223132).

The spelling of 2111202020 in words is "two billion, one hundred eleven million, two hundred two thousand, twenty".