2100011020 has 48 divisors (see below), whose sum is σ = 4735257408. Its totient is φ = 779448320.

The previous prime is 2100011009. The next prime is 2100011041. The reversal of 2100011020 is 201100012.

It is a junction number, because it is equal to n+sod(n) for n = 2100010994 and 2100011012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19357 + ... + 67636.

It is an arithmetic number, because the mean of its divisors is an integer number (98651196).

Almost surely, 2^2100011020 is an apocalyptic number.

2100011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100011020 is an abundant number, since it is smaller than the sum of its proper divisors (2635246388).

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

2100011020 is a wasteful number, since it uses less digits than its factorization.

2100011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87090 (or 87088 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2100011020 is about 45825.8771874582. The cubic root of 2100011020 is about 1280.5814049808.

Adding to 2100011020 its reverse (201100012), we get a palindrome (2301111032).

The spelling of 2100011020 in words is "two billion, one hundred million, eleven thousand, twenty".