20102221120121 has 12 divisors (see below), whose sum is σ = 23473174987008. Its totient is φ = 16863869376552.

The previous prime is 20102221120063. The next prime is 20102221120181. The reversal of 20102221120121 is 12102112220102.

It is not a de Polignac number, because 20102221120121 - 2³⁸ = 19827343213177 is a prime.

It is a super-2 number, since 2×20102221120121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102221120121.

It is not an unprimeable number, because it can be changed into a prime (20102221120181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 649994921 + ... + 650025846.

It is an arithmetic number, because the mean of its divisors is an integer number (1956097915584).

Almost surely, 2^{20102221120121} is an apocalyptic number.

It is an amenable number.

20102221120121 is a deficient number, since it is larger than the sum of its proper divisors (3370953866887).

20102221120121 is an equidigital number, since it uses as much as digits as its factorization.

20102221120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300020868 (or 1300020821 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20102221120121 its reverse (12102112220102), we get a palindrome (32204333340223).

The spelling of 20102221120121 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twenty-one".