12011731 has 2 divisors, whose sum is σ = 12011732. Its totient is φ = 12011730.

The previous prime is 12011723. The next prime is 12011767. The reversal of 12011731 is 13711021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12011731 - 2³ = 12011723 is a prime.

It is a super-2 number, since 2×12011731² = 288563363232722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12011711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005865 + 6005866.

It is an arithmetic number, because the mean of its divisors is an integer number (6005866).

Almost surely, 2^12011731 is an apocalyptic number.

12011731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011731 is an equidigital number, since it uses as much as digits as its factorization.

12011731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 12011731 is about 3465.7944255250. The cubic root of 12011731 is about 229.0174277845.

Adding to 12011731 its reverse (13711021), we get a palindrome (25722752).

The spelling of 12011731 in words is "twelve million, eleven thousand, seven hundred thirty-one".