2101010020 has 24 divisors (see below), whose sum is σ = 4443868800. Its totient is φ = 834356832.

The previous prime is 2101010011. The next prime is 2101010069. The reversal of 2101010020 is 200101012.

It is a junction number, because it is equal to n+sod(n) for n = 2101009985 and 2101010012.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 375100 + ... + 380659.

It is an arithmetic number, because the mean of its divisors is an integer number (185161200).

Almost surely, 2^2101010020 is an apocalyptic number.

2101010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101010020 is an abundant number, since it is smaller than the sum of its proper divisors (2342858780).

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

2101010020 is a wasteful number, since it uses less digits than its factorization.

2101010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755907 (or 755905 counting only the distinct ones).

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

The square root of 2101010020 is about 45836.7758464751. The cubic root of 2101010020 is about 1280.7844353467.

Adding to 2101010020 its reverse (200101012), we get a palindrome (2301111032).

The spelling of 2101010020 in words is "two billion, one hundred one million, ten thousand, twenty".