12111311201312 has 96 divisors (see below), whose sum is σ = 25415215257600. Its totient is φ = 5664756411648.

The previous prime is 12111311201291. The next prime is 12111311201323. The reversal of 12111311201312 is 21310211311121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94757993 + ... + 94885719.

It is an arithmetic number, because the mean of its divisors is an integer number (264741825600).

Almost surely, 2^{12111311201312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12111311201312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12707607628800).

12111311201312 is an abundant number, since it is smaller than the sum of its proper divisors (13303904056288).

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

12111311201312 is a wasteful number, since it uses less digits than its factorization.

12111311201312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129718 (or 129710 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 12111311201312 its reverse (21310211311121), we get a palindrome (33421522512433).

The spelling of 12111311201312 in words is "twelve trillion, one hundred eleven billion, three hundred eleven million, two hundred one thousand, three hundred twelve".