20102110022021 has 4 divisors (see below), whose sum is σ = 20137438862700. Its totient is φ = 20066781181344.

The previous prime is 20102110022009. The next prime is 20102110022051. The reversal of 20102110022021 is 12022001120102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4537585885921 + 15564524136100 = 2130161^2 + 3945190^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102110022021 - 2²⁶ = 20102042913157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102110021987 and 20102110022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102110022051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17664419486 + ... + 17664420623.

It is an arithmetic number, because the mean of its divisors is an integer number (5034359715675).

Almost surely, 2^{20102110022021} is an apocalyptic number.

It is an amenable number.

20102110022021 is a deficient number, since it is larger than the sum of its proper divisors (35328840679).

20102110022021 is an equidigital number, since it uses as much as digits as its factorization.

20102110022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35328840678.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102110022021 its reverse (12022001120102), we get a palindrome (32124111142123).

The spelling of 20102110022021 in words is "twenty trillion, one hundred two billion, one hundred ten million, twenty-two thousand, twenty-one".