12310111220 has 48 divisors (see below), whose sum is σ = 28801398528. Its totient is φ = 4381157760.

The previous prime is 12310111207. The next prime is 12310111223. The reversal of 12310111220 is 2211101321.

It is a junction number, because it is equal to n+sod(n) for n = 12310111195 and 12310111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310111223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584927 + ... + 605606.

It is an arithmetic number, because the mean of its divisors is an integer number (600029136).

Almost surely, 2^12310111220 is an apocalyptic number.

12310111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12310111220 is an abundant number, since it is smaller than the sum of its proper divisors (16491287308).

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

12310111220 is a wasteful number, since it uses less digits than its factorization.

12310111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190600 (or 1190598 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12310111220 its reverse (2211101321), we get a palindrome (14521212541).

The spelling of 12310111220 in words is "twelve billion, three hundred ten million, one hundred eleven thousand, two hundred twenty".