201212111200 has 72 divisors (see below), whose sum is σ = 499261795200. Its totient is φ = 79165401600.

The previous prime is 201212111183. The next prime is 201212111209. The reversal of 201212111200 is 2111212102.

It is a super-2 number, since 2×201212111200² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212111209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2012800 + ... + 2110399.

It is an arithmetic number, because the mean of its divisors is an integer number (6934191600).

Almost surely, 2^201212111200 is an apocalyptic number.

201212111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212111200 is an abundant number, since it is smaller than the sum of its proper divisors (298049684000).

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

201212111200 is a wasteful number, since it uses less digits than its factorization.

201212111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123280 (or 4123267 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201212111200 its reverse (2111212102), we get a palindrome (203323323302).

The spelling of 201212111200 in words is "two hundred one billion, two hundred twelve million, one hundred eleven thousand, two hundred".