12311000220 has 96 divisors (see below), whose sum is σ = 36348238080. Its totient is φ = 3104732160.

The previous prime is 12311000213. The next prime is 12311000227. The reversal of 12311000220 is 2200011321.

It is an interprime number because it is at equal distance from previous prime (12311000213) and next prime (12311000227).

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

It is a junction number, because it is equal to n+sod(n) for n = 12311000196 and 12311000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311000227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 666915 + ... + 685125.

It is an arithmetic number, because the mean of its divisors is an integer number (378627480).

Almost surely, 2^12311000220 is an apocalyptic number.

12311000220 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 12311000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18174119040).

12311000220 is an abundant number, since it is smaller than the sum of its proper divisors (24037237860).

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

12311000220 is a wasteful number, since it uses less digits than its factorization.

12311000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18835 (or 18833 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 12311000220 its reverse (2200011321), we get a palindrome (14511011541).

The spelling of 12311000220 in words is "twelve billion, three hundred eleven million, two hundred twenty", and thus it is an aban number.