11311231200 has 72 divisors (see below), whose sum is σ = 36818065368. Its totient is φ = 3016327680.

The previous prime is 11311231181. The next prime is 11311231213. The reversal of 11311231200 is 213211311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11311231200.

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, 2354107 + ... + 2358906.

It is an arithmetic number, because the mean of its divisors is an integer number (511362019).

Almost surely, 2^11311231200 is an apocalyptic number.

11311231200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311231200 is an abundant number, since it is smaller than the sum of its proper divisors (25506834168).

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

11311231200 is a wasteful number, since it uses less digits than its factorization.

11311231200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713036 (or 4713023 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11311231200 its reverse (213211311), we get a palindrome (11524442511).

The spelling of 11311231200 in words is "eleven billion, three hundred eleven million, two hundred thirty-one thousand, two hundred".