12312102312 has 24 divisors (see below), whose sum is σ = 33345277290. Its totient is φ = 4104034080.

The previous prime is 12312102269. The next prime is 12312102317. The reversal of 12312102312 is 21320121321.

It can be written as a sum of positive squares in only one way, i.e., 6357510756 + 5954591556 = 79734^2 + 77166^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12312102317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85500639 + ... + 85500782.

Almost surely, 2^12312102312 is an apocalyptic number.

12312102312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12312102312 is an abundant number, since it is smaller than the sum of its proper divisors (21033174978).

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

12312102312 is a wasteful number, since it uses less digits than its factorization.

12312102312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171001433 (or 171001426 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12312102312 its reverse (21320121321), we get a palindrome (33632223633).

The spelling of 12312102312 in words is "twelve billion, three hundred twelve million, one hundred two thousand, three hundred twelve".