20102130021 has 16 divisors (see below), whose sum is σ = 26854842560. Its totient is φ = 13375445760.

The previous prime is 20102130011. The next prime is 20102130049. The reversal of 20102130021 is 12003120102.

It is not a de Polignac number, because 20102130021 - 2⁵ = 20102129989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102129979 and 20102130006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102130001) 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 15 ways as a sum of consecutive naturals, for example, 5297901 + ... + 5301693.

It is an arithmetic number, because the mean of its divisors is an integer number (1678427660).

Almost surely, 2^20102130021 is an apocalyptic number.

It is an amenable number.

20102130021 is a deficient number, since it is larger than the sum of its proper divisors (6752712539).

20102130021 is a wasteful number, since it uses less digits than its factorization.

20102130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6756.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20102130021 its reverse (12003120102), we get a palindrome (32105250123).

The spelling of 20102130021 in words is "twenty billion, one hundred two million, one hundred thirty thousand, twenty-one".