12102102157 has 2 divisors, whose sum is σ = 12102102158. Its totient is φ = 12102102156.

The previous prime is 12102102101. The next prime is 12102102223. The reversal of 12102102157 is 75120120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11675018601 + 427083556 = 108051^2 + 20666^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102102157 - 2²³ = 12093713549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102108157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051051078 + 6051051079.

It is an arithmetic number, because the mean of its divisors is an integer number (6051051079).

Almost surely, 2^12102102157 is an apocalyptic number.

It is an amenable number.

12102102157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102102157 is an equidigital number, since it uses as much as digits as its factorization.

12102102157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 12102102157 its reverse (75120120121), we get a palindrome (87222222278).

The spelling of 12102102157 in words is "twelve billion, one hundred two million, one hundred two thousand, one hundred fifty-seven".