12131011 has 4 divisors (see below), whose sum is σ = 12359952. Its totient is φ = 11902072.

The previous prime is 12130999. The next prime is 12131017. The reversal of 12131011 is 11013121.

12131011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11013121 = 7 ⋅1573303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131011 is a prime.

It is a super-2 number, since 2×12131011² = 294322855764242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131017) 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, 114391 + ... + 114496.

It is an arithmetic number, because the mean of its divisors is an integer number (3089988).

Almost surely, 2^12131011 is an apocalyptic number.

12131011 is a deficient number, since it is larger than the sum of its proper divisors (228941).

12131011 is an equidigital number, since it uses as much as digits as its factorization.

12131011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228940.

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

The square root of 12131011 is about 3482.9600916462. The cubic root of 12131011 is about 229.7730022520.

Adding to 12131011 its reverse (11013121), we get a palindrome (23144132).

The spelling of 12131011 in words is "twelve million, one hundred thirty-one thousand, eleven".