12111302312 has 8 divisors (see below), whose sum is σ = 22708691850. Its totient is φ = 6055651152.

The previous prime is 12111302311. The next prime is 12111302327. The reversal of 12111302312 is 21320311121.

It can be written as a sum of positive squares in only one way, i.e., 9282551716 + 2828750596 = 96346^2 + 53186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12111302311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756956387 + ... + 756956402.

Almost surely, 2^12111302312 is an apocalyptic number.

It is an amenable number.

12111302312 is a deficient number, since it is larger than the sum of its proper divisors (10597389538).

12111302312 is a wasteful number, since it uses less digits than its factorization.

12111302312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513912795 (or 1513912791 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12111302312 its reverse (21320311121), we get a palindrome (33431613433).

The spelling of 12111302312 in words is "twelve billion, one hundred eleven million, three hundred two thousand, three hundred twelve".