201211111200 has 144 divisors (see below), whose sum is σ = 714482457696. Its totient is φ = 48778444800.

The previous prime is 201211111141. The next prime is 201211111219. The reversal of 201211111200 is 2111112102.

It is a super-2 number, since 2×201211111200² (a number of 23 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 3784417 + ... + 3837216.

It is an arithmetic number, because the mean of its divisors is an integer number (4961683734).

Almost surely, 2^201211111200 is an apocalyptic number.

201211111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211111200 is an abundant number, since it is smaller than the sum of its proper divisors (513271346496).

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

201211111200 is a wasteful number, since it uses less digits than its factorization.

201211111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7621667 (or 7621654 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201211111200 its reverse (2111112102), we get a palindrome (203322223302).

The spelling of 201211111200 in words is "two hundred one billion, two hundred eleven million, one hundred eleven thousand, two hundred".