20111220222 has 16 divisors (see below), whose sum is σ = 40822776192. Its totient is φ = 6603684120.

The previous prime is 20111220211. The next prime is 20111220251. The reversal of 20111220222 is 22202211102.

It is a super-2 number, since 2×20111220222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25013554 + ... + 25014357.

It is an arithmetic number, because the mean of its divisors is an integer number (2551423512).

Almost surely, 2^20111220222 is an apocalyptic number.

20111220222 is an abundant number, since it is smaller than the sum of its proper divisors (20711555970).

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

20111220222 is a wasteful number, since it uses less digits than its factorization.

20111220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50027983.

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

Adding to 20111220222 its reverse (22202211102), we get a palindrome (42313431324).

The spelling of 20111220222 in words is "twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-two".