20111222200 has 48 divisors (see below), whose sum is σ = 46878975000. Its totient is φ = 8023777920.

The previous prime is 20111222191. The next prime is 20111222203. The reversal of 20111222200 is 222211102.

It is a happy number.

It is a super-2 number, since 2×20111222200² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111222203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51450 + ... + 207049.

Almost surely, 2^20111222200 is an apocalyptic number.

20111222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111222200 is an abundant number, since it is smaller than the sum of its proper divisors (26767752800).

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

20111222200 is a wasteful number, since it uses less digits than its factorization.

20111222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258904 (or 258895 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20111222200 its reverse (222211102), we get a palindrome (20333433302).

The spelling of 20111222200 in words is "twenty billion, one hundred eleven million, two hundred twenty-two thousand, two hundred".