20102110221 has 8 divisors (see below), whose sum is σ = 26805805984. Its totient is φ = 13399910640.

The previous prime is 20102110187. The next prime is 20102110277. The reversal of 20102110221 is 12201120102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20102110221 - 2²¹ = 20100013069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20102110197 and 20102110206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102110121) 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, 342310 + ... + 396711.

It is an arithmetic number, because the mean of its divisors is an integer number (3350725748).

Almost surely, 2^20102110221 is an apocalyptic number.

It is an amenable number.

20102110221 is a deficient number, since it is larger than the sum of its proper divisors (6703695763).

20102110221 is an equidigital number, since it uses as much as digits as its factorization.

20102110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748091.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20102110221 its reverse (12201120102), we get a palindrome (32303230323).

The spelling of 20102110221 in words is "twenty billion, one hundred two million, one hundred ten thousand, two hundred twenty-one".