12311033100 has 288 divisors, whose sum is σ = 38217553920. Its totient is φ = 3054336000.

The previous prime is 12311033081. The next prime is 12311033113. The reversal of 12311033100 is 133011321.

It is a super-2 number, since 2×12311033100² (a number of 21 digits) contains 22 as substring.

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 12311033100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31647706 + ... + 31648094.

It is an arithmetic number, because the mean of its divisors is an integer number (132699840).

Almost surely, 2^12311033100 is an apocalyptic number.

12311033100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311033100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19108776960).

12311033100 is an abundant number, since it is smaller than the sum of its proper divisors (25906520820).

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

12311033100 is a wasteful number, since it uses less digits than its factorization.

12311033100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 12311033100 its reverse (133011321), we get a palindrome (12444044421).

The spelling of 12311033100 in words is "twelve billion, three hundred eleven million, thirty-three thousand, one hundred".