20111220200200 has 24 divisors (see below), whose sum is σ = 46758586965930. Its totient is φ = 8044488080000.

The previous prime is 20111220200173. The next prime is 20111220200207. The reversal of 20111220200200 is 200202211102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8138775945316 + 11972444254884 = 2852854^2 + 3460122^2 .

It is a super-2 number, since 2×20111220200200² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20111220200207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50278050301 + ... + 50278050700.

Almost surely, 2^{20111220200200} is an apocalyptic number.

20111220200200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111220200200 is an abundant number, since it is smaller than the sum of its proper divisors (26647366765730).

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

20111220200200 is a wasteful number, since it uses less digits than its factorization.

20111220200200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100556101017 (or 100556101008 counting only the distinct ones).

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

Adding to 20111220200200 its reverse (200202211102), we get a palindrome (20311422411302).

The spelling of 20111220200200 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, two hundred thousand, two hundred".