12156352111 has 4 divisors (see below), whose sum is σ = 12249148824. Its totient is φ = 12063555400.

The previous prime is 12156352007. The next prime is 12156352123. The reversal of 12156352111 is 11125365121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12156352111 - 2¹⁷ = 12156221039 is a prime.

It is a super-2 number, since 2×12156352111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12156352111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156352141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46398160 + ... + 46398421.

It is an arithmetic number, because the mean of its divisors is an integer number (3062287206).

Almost surely, 2^12156352111 is an apocalyptic number.

12156352111 is a deficient number, since it is larger than the sum of its proper divisors (92796713).

12156352111 is an equidigital number, since it uses as much as digits as its factorization.

12156352111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92796712.

The product of its digits is 1800, while the sum is 28.

The spelling of 12156352111 in words is "twelve billion, one hundred fifty-six million, three hundred fifty-two thousand, one hundred eleven".