12101131 has 4 divisors (see below), whose sum is σ = 13829872. Its totient is φ = 10372392.

The previous prime is 12101123. The next prime is 12101147. The reversal of 12101131 is 13110121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12101131 - 2³ = 12101123 is a prime.

It is a super-2 number, since 2×12101131² = 292874742958322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12101171) 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 3 ways as a sum of consecutive naturals, for example, 864360 + ... + 864373.

It is an arithmetic number, because the mean of its divisors is an integer number (3457468).

Almost surely, 2^12101131 is an apocalyptic number.

12101131 is a deficient number, since it is larger than the sum of its proper divisors (1728741).

12101131 is an equidigital number, since it uses as much as digits as its factorization.

12101131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728740.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 12101131 is about 3478.6679922062. The cubic root of 12101131 is about 229.5841951813.

Adding to 12101131 its reverse (13110121), we get a palindrome (25211252).

The spelling of 12101131 in words is "twelve million, one hundred one thousand, one hundred thirty-one".