11212111200 has 72 divisors (see below), whose sum is σ = 36495429768. Its totient is φ = 2989895680.

The previous prime is 11212111193. The next prime is 11212111213. The reversal of 11212111200 is 211121211.

It is a super-2 number, since 2×11212111200² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2333457 + ... + 2338256.

It is an arithmetic number, because the mean of its divisors is an integer number (506880969).

Almost surely, 2^11212111200 is an apocalyptic number.

11212111200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212111200 is an abundant number, since it is smaller than the sum of its proper divisors (25283318568).

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

11212111200 is a wasteful number, since it uses less digits than its factorization.

11212111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671736 (or 4671723 counting only the distinct ones).

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

Adding to 11212111200 its reverse (211121211), we get a palindrome (11423232411).

It can be divided in two parts, 112121 and 11200, that added together give a palindrome (123321).

The spelling of 11212111200 in words is "eleven billion, two hundred twelve million, one hundred eleven thousand, two hundred".