20001021102222 has 16 divisors (see below), whose sum is σ = 40045570008960. Its totient is φ = 6659752399992.

The previous prime is 20001021102217. The next prime is 20001021102229. The reversal of 20001021102222 is 22220112010002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001021102229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1813652548 + ... + 1813663575.

It is an arithmetic number, because the mean of its divisors is an integer number (2502848125560).

Almost surely, 2^{20001021102222} is an apocalyptic number.

20001021102222 is an abundant number, since it is smaller than the sum of its proper divisors (20044548906738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001021102222 is a wasteful number, since it uses less digits than its factorization.

20001021102222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627317047.

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

Adding to 20001021102222 its reverse (22220112010002), we get a palindrome (42221133112224).

The spelling of 20001021102222 in words is "twenty trillion, one billion, twenty-one million, one hundred two thousand, two hundred twenty-two".