12013121312 has 24 divisors (see below), whose sum is σ = 23654653596. Its totient is φ = 6005590272.

The previous prime is 12013121311. The next prime is 12013121321. The reversal of 12013121312 is 21312131021.

It can be written as a sum of positive squares in 2 ways, for example, as 10525939216 + 1487182096 = 102596^2 + 38564^2 .

It is not an unprimeable number, because it can be changed into a prime (12013121311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197078 + ... + 250730.

Almost surely, 2^12013121312 is an apocalyptic number.

It is an amenable number.

12013121312 is a deficient number, since it is larger than the sum of its proper divisors (11641532284).

12013121312 is an equidigital number, since it uses as much as digits as its factorization.

12013121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60660 (or 60652 counting only the distinct ones).

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

Adding to 12013121312 its reverse (21312131021), we get a palindrome (33325252333).

The spelling of 12013121312 in words is "twelve billion, thirteen million, one hundred twenty-one thousand, three hundred twelve".