20011122222 has 64 divisors (see below), whose sum is σ = 49993434624. Its totient is φ = 5198878080.

The previous prime is 20011122199. The next prime is 20011122227. The reversal of 20011122222 is 22222111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011122227) 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 31 ways as a sum of consecutive naturals, for example, 236929 + ... + 310092.

It is an arithmetic number, because the mean of its divisors is an integer number (781147416).

Almost surely, 2^20011122222 is an apocalyptic number.

20011122222 is an abundant number, since it is smaller than the sum of its proper divisors (29982312402).

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

20011122222 is a wasteful number, since it uses less digits than its factorization.

20011122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547113.

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

Adding to 20011122222 its reverse (22222111002), we get a palindrome (42233233224).

The spelling of 20011122222 in words is "twenty billion, eleven million, one hundred twenty-two thousand, two hundred twenty-two".