12111131067857 has 2 divisors, whose sum is σ = 12111131067858. Its totient is φ = 12111131067856.

The previous prime is 12111131067853. The next prime is 12111131067941. The reversal of 12111131067857 is 75876013111121.

12111131067857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11945104156561 + 166026911296 = 3456169^2 + 407464^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111131067857 - 2² = 12111131067853 is a prime.

It is a super-2 number, since 2×12111131067857² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12111131067851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055565533928 + 6055565533929.

It is an arithmetic number, because the mean of its divisors is an integer number (6055565533929).

Almost surely, 2^{12111131067857} is an apocalyptic number.

It is an amenable number.

12111131067857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111131067857 is an equidigital number, since it uses as much as digits as its factorization.

12111131067857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 44.

Adding to 12111131067857 its reverse (75876013111121), we get a palindrome (87987144178978).

The spelling of 12111131067857 in words is "twelve trillion, one hundred eleven billion, one hundred thirty-one million, sixty-seven thousand, eight hundred fifty-seven".