12011431 has 4 divisors (see below), whose sum is σ = 12023200. Its totient is φ = 11999664.

The previous prime is 12011411. The next prime is 12011459. The reversal of 12011431 is 13411021.

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 12011431 - 2⁷ = 12011303 is a prime.

It is a super-2 number, since 2×12011431² = 288548949335522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011411) 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, 4191 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (3005800).

Almost surely, 2^12011431 is an apocalyptic number.

12011431 is a deficient number, since it is larger than the sum of its proper divisors (11769).

12011431 is a wasteful number, since it uses less digits than its factorization.

12011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11768.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 12011431 is about 3465.7511451343. The cubic root of 12011431 is about 229.0155211539.

Adding to 12011431 its reverse (13411021), we get a palindrome (25422452).

The spelling of 12011431 in words is "twelve million, eleven thousand, four hundred thirty-one".