12311101212 has 24 divisors (see below), whose sum is σ = 28840355712. Its totient is φ = 4087350000.

The previous prime is 12311101211. The next prime is 12311101213. The reversal of 12311101212 is 21210111321.

It is an interprime number because it is at equal distance from previous prime (12311101211) and next prime (12311101213).

It is a junction number, because it is equal to n+sod(n) for n = 12311101191 and 12311101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311101211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2040664 + ... + 2046687.

It is an arithmetic number, because the mean of its divisors is an integer number (1201681488).

Almost surely, 2^12311101212 is an apocalyptic number.

12311101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12311101212 is an abundant number, since it is smaller than the sum of its proper divisors (16529254500).

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

12311101212 is a wasteful number, since it uses less digits than its factorization.

12311101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4087609 (or 4087607 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12311101212 its reverse (21210111321), we get a palindrome (33521212533).

The spelling of 12311101212 in words is "twelve billion, three hundred eleven million, one hundred one thousand, two hundred twelve".