12311111201212 has 96 divisors (see below), whose sum is σ = 23747626490112. Its totient is φ = 5560650940416.

The previous prime is 12311111201203. The next prime is 12311111201321. The reversal of 12311111201212 is 21210211111321.

It is a self number, because there is not a number n which added to its sum of digits gives 12311111201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 395166628 + ... + 395197780.

It is an arithmetic number, because the mean of its divisors is an integer number (247371109272).

Almost surely, 2^{12311111201212} is an apocalyptic number.

It is an amenable number.

12311111201212 is a deficient number, since it is larger than the sum of its proper divisors (11436515288900).

12311111201212 is a wasteful number, since it uses less digits than its factorization.

12311111201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33607 (or 33605 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 12311111201212 its reverse (21210211111321), we get a palindrome (33521322312533).

The spelling of 12311111201212 in words is "twelve trillion, three hundred eleven billion, one hundred eleven million, two hundred one thousand, two hundred twelve".