20001222202222 has 16 divisors (see below), whose sum is σ = 31037234014800. Its totient is φ = 9655496524800.

The previous prime is 20001222202217. The next prime is 20001222202229. The reversal of 20001222202222 is 22220222210002.

It is a self number, because there is not a number n which added to its sum of digits gives 20001222202222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001222202229) 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, 2616147 + ... + 6844462.

It is an arithmetic number, because the mean of its divisors is an integer number (1939827125925).

Almost surely, 2^{20001222202222} is an apocalyptic number.

20001222202222 is a deficient number, since it is larger than the sum of its proper divisors (11036011812578).

20001222202222 is a wasteful number, since it uses less digits than its factorization.

20001222202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9497091.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 20001222202222 its reverse (22220222210002), we get a palindrome (42221444412224).

The spelling of 20001222202222 in words is "twenty trillion, one billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty-two".