20001222222 has 16 divisors (see below), whose sum is σ = 41381839440. Its totient is φ = 6437174912.

The previous prime is 20001222221. The next prime is 20001222281. The reversal of 20001222222 is 22222210002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001222221) 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, 57474603 + ... + 57474950.

It is an arithmetic number, because the mean of its divisors is an integer number (2586364965).

Almost surely, 2^20001222222 is an apocalyptic number.

20001222222 is an abundant number, since it is smaller than the sum of its proper divisors (21380617218).

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

20001222222 is a wasteful number, since it uses less digits than its factorization.

20001222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114949587.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20001222222 its reverse (22222210002), we get a palindrome (42223432224).

The spelling of 20001222222 in words is "twenty billion, one million, two hundred twenty-two thousand, two hundred twenty-two".