12102157 has 2 divisors, whose sum is σ = 12102158. Its totient is φ = 12102156.

The previous prime is 12102151. The next prime is 12102199. The reversal of 12102157 is 75120121.

12102157 is digitally balanced in base 3, 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., 6584356 + 5517801 = 2566^2 + 2349^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102157 - 2⁷ = 12102029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051078 + 6051079.

It is an arithmetic number, because the mean of its divisors is an integer number (6051079).

Almost surely, 2^12102157 is an apocalyptic number.

It is an amenable number.

12102157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102157 is an equidigital number, since it uses as much as digits as its factorization.

12102157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 12102157 is about 3478.8154593195. The cubic root of 12102157 is about 229.5906834654.

Adding to 12102157 its reverse (75120121), we get a palindrome (87222278).

The spelling of 12102157 in words is "twelve million, one hundred two thousand, one hundred fifty-seven".