12343432181 has 2 divisors, whose sum is σ = 12343432182. Its totient is φ = 12343432180.

The previous prime is 12343432121. The next prime is 12343432217. The reversal of 12343432181 is 18123434321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11635073956 + 708358225 = 107866^2 + 26615^2 .

It is an emirp because it is prime and its reverse (18123434321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12343432181 - 2⁶ = 12343432117 is a prime.

It is a super-2 number, since 2×12343432181² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12343432111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6171716090 + 6171716091.

It is an arithmetic number, because the mean of its divisors is an integer number (6171716091).

Almost surely, 2^12343432181 is an apocalyptic number.

It is an amenable number.

12343432181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12343432181 is an equidigital number, since it uses as much as digits as its factorization.

12343432181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The spelling of 12343432181 in words is "twelve billion, three hundred forty-three million, four hundred thirty-two thousand, one hundred eighty-one".