1211100220200 has 384 divisors, whose sum is σ = 4148934451200. Its totient is φ = 290361093120.

The previous prime is 1211100220193. The next prime is 1211100220223. The reversal of 1211100220200 is 20220011121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 123086881 + ... + 123096719.

It is an arithmetic number, because the mean of its divisors is an integer number (10804516800).

Almost surely, 2^{1211100220200} is an apocalyptic number.

1211100220200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211100220200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074467225600).

1211100220200 is an abundant number, since it is smaller than the sum of its proper divisors (2937834231000).

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

1211100220200 is a wasteful number, since it uses less digits than its factorization.

1211100220200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10281 (or 10272 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1211100220200 its reverse (20220011121), we get a palindrome (1231320231321).

The spelling of 1211100220200 in words is "one trillion, two hundred eleven billion, one hundred million, two hundred twenty thousand, two hundred".