12101157 has 24 divisors (see below), whose sum is σ = 19088160. Its totient is φ = 7639920.

The previous prime is 12101153. The next prime is 12101171. The reversal of 12101157 is 75110121.

It is a happy number.

It is not a de Polignac number, because 12101157 - 2² = 12101153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101153) 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 in 23 ways as a sum of consecutive naturals, for example, 3307 + ... + 5927.

It is an arithmetic number, because the mean of its divisors is an integer number (795340).

Almost surely, 2^12101157 is an apocalyptic number.

It is an amenable number.

12101157 is a deficient number, since it is larger than the sum of its proper divisors (6987003).

12101157 is an equidigital number, since it uses as much as digits as its factorization.

12101157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 12101157 is about 3478.6717292668. The cubic root of 12101157 is about 229.5843596063.

Adding to 12101157 its reverse (75110121), we get a palindrome (87211278).

The spelling of 12101157 in words is "twelve million, one hundred one thousand, one hundred fifty-seven".