20102221102221 has 48 divisors (see below), whose sum is σ = 31421611079040. Its totient is φ = 12340897845120.

The previous prime is 20102221102219. The next prime is 20102221102241. The reversal of 20102221102221 is 12220112220102.

It is a happy number.

20102221102221 is a `hidden beast` number, since 20 + 102 + 221 + 102 + 221 = 666.

It is not a de Polignac number, because 20102221102221 - 2¹ = 20102221102219 is a prime.

It is a super-2 number, since 2×20102221102221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102221102194 and 20102221102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102221102211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4903936 + ... + 8015798.

It is an arithmetic number, because the mean of its divisors is an integer number (654616897480).

Almost surely, 2^{20102221102221} is an apocalyptic number.

It is an amenable number.

20102221102221 is a deficient number, since it is larger than the sum of its proper divisors (11319389976819).

20102221102221 is a wasteful number, since it uses less digits than its factorization.

20102221102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112946 (or 3112943 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20102221102221 its reverse (12220112220102), we get a palindrome (32322333322323).

The spelling of 20102221102221 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".