20102221222221 has 8 divisors (see below), whose sum is σ = 26818303915744. Its totient is φ = 13393809671760.

The previous prime is 20102221222217. The next prime is 20102221222247. The reversal of 20102221222221 is 12222212220102.

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

It is not a de Polignac number, because 20102221222221 - 2² = 20102221222217 is a prime.

It is a super-2 number, since 2×20102221222221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102221222121) 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, 1917779650 + ... + 1917790131.

It is an arithmetic number, because the mean of its divisors is an integer number (3352287989468).

Almost surely, 2^{20102221222221} is an apocalyptic number.

It is an amenable number.

20102221222221 is a deficient number, since it is larger than the sum of its proper divisors (6716082693523).

20102221222221 is a wasteful number, since it uses less digits than its factorization.

20102221222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835571531.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20102221222221 its reverse (12222212220102), we get a palindrome (32324433442323).

The spelling of 20102221222221 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".