20102202210021 has 8 divisors (see below), whose sum is σ = 27527339963424. Its totient is φ = 13039266298320.

The previous prime is 20102202210001. The next prime is 20102202210059. The reversal of 20102202210021 is 12001220220102.

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

It is a de Polignac number, because none of the positive numbers 2^k-20102202210021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102202210001) 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, 90550460295 + ... + 90550460516.

It is an arithmetic number, because the mean of its divisors is an integer number (3440917495428).

Almost surely, 2^{20102202210021} is an apocalyptic number.

It is an amenable number.

20102202210021 is a deficient number, since it is larger than the sum of its proper divisors (7425137753403).

20102202210021 is a wasteful number, since it uses less digits than its factorization.

20102202210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181100920851.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20102202210021 its reverse (12001220220102), we get a palindrome (32103422430123).

The spelling of 20102202210021 in words is "twenty trillion, one hundred two billion, two hundred two million, two hundred ten thousand, twenty-one".