12111106181 has 2 divisors, whose sum is σ = 12111106182. Its totient is φ = 12111106180.

The previous prime is 12111106129. The next prime is 12111106201. The reversal of 12111106181 is 18160111121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6433483681 + 5677622500 = 80209^2 + 75350^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111106181 - 2¹⁰ = 12111105157 is a prime.

It is a super-2 number, since 2×12111106181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111136181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055553090 + 6055553091.

It is an arithmetic number, because the mean of its divisors is an integer number (6055553091).

Almost surely, 2^12111106181 is an apocalyptic number.

It is an amenable number.

12111106181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111106181 is an equidigital number, since it uses as much as digits as its factorization.

12111106181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 23.

The spelling of 12111106181 in words is "twelve billion, one hundred eleven million, one hundred six thousand, one hundred eighty-one".