12155102173 has 2 divisors, whose sum is σ = 12155102174. Its totient is φ = 12155102172.

The previous prime is 12155102171. The next prime is 12155102209. The reversal of 12155102173 is 37120155121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6753881124 + 5401221049 = 82182^2 + 73493^2 .

It is a cyclic number.

It is not a de Polignac number, because 12155102173 - 2¹ = 12155102171 is a prime.

Together with 12155102171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12155102171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6077551086 + 6077551087.

It is an arithmetic number, because the mean of its divisors is an integer number (6077551087).

Almost surely, 2^12155102173 is an apocalyptic number.

It is an amenable number.

12155102173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12155102173 is an equidigital number, since it uses as much as digits as its factorization.

12155102173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 28.

Adding to 12155102173 its reverse (37120155121), we get a palindrome (49275257294).

The spelling of 12155102173 in words is "twelve billion, one hundred fifty-five million, one hundred two thousand, one hundred seventy-three".