12102131 has 4 divisors (see below), whose sum is σ = 12238200. Its totient is φ = 11966064.

The previous prime is 12102127. The next prime is 12102133. The reversal of 12102131 is 13120121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13120121 = 7 ⋅1874303.

It is a cyclic number.

It is not a de Polignac number, because 12102131 - 2² = 12102127 is a prime.

It is a super-2 number, since 2×12102131² = 292923149482322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67901 + ... + 68078.

It is an arithmetic number, because the mean of its divisors is an integer number (3059550).

Almost surely, 2^12102131 is an apocalyptic number.

12102131 is a deficient number, since it is larger than the sum of its proper divisors (136069).

12102131 is an equidigital number, since it uses as much as digits as its factorization.

12102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136068.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12102131 is about 3478.8117224133. The cubic root of 12102131 is about 229.5905190495.

Adding to 12102131 its reverse (13120121), we get a palindrome (25222252).

The spelling of 12102131 in words is "twelve million, one hundred two thousand, one hundred thirty-one".