1211022012200 has 384 divisors, whose sum is σ = 3902390231040. Its totient is φ = 337184640000.

The previous prime is 1211022012191. The next prime is 1211022012247. The reversal of 1211022012200 is 22102201121.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 6108635 + ... + 6303765.

It is an arithmetic number, because the mean of its divisors is an integer number (10162474560).

Almost surely, 2^{1211022012200} is an apocalyptic number.

1211022012200 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 1211022012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951195115520).

1211022012200 is an abundant number, since it is smaller than the sum of its proper divisors (2691368218840).

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

1211022012200 is a wasteful number, since it uses less digits than its factorization.

1211022012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195209 (or 195200 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1211022012200 its reverse (22102201121), we get a palindrome (1233124213321).

The spelling of 1211022012200 in words is "one trillion, two hundred eleven billion, twenty-two million, twelve thousand, two hundred".