1211200322112 has 84 divisors (see below), whose sum is σ = 3787294966416. Its totient is φ = 367030398720.

The previous prime is 1211200322089. The next prime is 1211200322119. The reversal of 1211200322112 is 2112230021121.

1211200322112 is a `hidden beast` number, since 1 + 211 + 20 + 0 + 322 + 112 = 666.

It is a super-2 number, since 2×1211200322112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1211200322119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95574498 + ... + 95587169.

Almost surely, 2^{1211200322112} is an apocalyptic number.

1211200322112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211200322112 is an abundant number, since it is smaller than the sum of its proper divisors (2576094644304).

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

1211200322112 is a wasteful number, since it uses less digits than its factorization.

1211200322112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191161696 (or 191161683 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1211200322112 its reverse (2112230021121), we get a palindrome (3323430343233).

The spelling of 1211200322112 in words is "one trillion, two hundred eleven billion, two hundred million, three hundred twenty-two thousand, one hundred twelve".