12001249312 has 48 divisors (see below), whose sum is σ = 25862141592. Its totient is φ = 5448222720.

The previous prime is 12001249301. The next prime is 12001249313. The reversal of 12001249312 is 21394210021.

It can be written as a sum of positive squares in 4 ways, for example, as 6297374736 + 5703874576 = 79356^2 + 75524^2 .

It is not an unprimeable number, because it can be changed into a prime (12001249313) 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, 211093 + ... + 261844.

Almost surely, 2^12001249312 is an apocalyptic number.

It is an amenable number.

12001249312 is an abundant number, since it is smaller than the sum of its proper divisors (13860892280).

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

12001249312 is a wasteful number, since it uses less digits than its factorization.

12001249312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473021 (or 473013 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 12001249312 its reverse (21394210021), we get a palindrome (33395459333).

The spelling of 12001249312 in words is "twelve billion, one million, two hundred forty-nine thousand, three hundred twelve".