12365543011011 has 16 divisors (see below), whose sum is σ = 16572802752000. Its totient is φ = 8200997991648.

The previous prime is 12365543011007. The next prime is 12365543011061. The reversal of 12365543011011 is 11011034556321.

It is a happy number.

It is not a de Polignac number, because 12365543011011 - 2² = 12365543011007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12365543011061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4639440 + ... + 6801138.

It is an arithmetic number, because the mean of its divisors is an integer number (1035800172000).

Almost surely, 2^{12365543011011} is an apocalyptic number.

12365543011011 is a deficient number, since it is larger than the sum of its proper divisors (4207259740989).

12365543011011 is a wasteful number, since it uses less digits than its factorization.

12365543011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171578.

The product of its (nonzero) digits is 10800, while the sum is 33.

Adding to 12365543011011 its reverse (11011034556321), we get a palindrome (23376577567332).

The spelling of 12365543011011 in words is "twelve trillion, three hundred sixty-five billion, five hundred forty-three million, eleven thousand, eleven".