12011031 has 16 divisors (see below), whose sum is σ = 17847520. Its totient is φ = 7983360.

The previous prime is 12011029. The next prime is 12011047. The reversal of 12011031 is 13011021.

It is not a de Polignac number, because 12011031 - 2¹ = 12011029 is a prime.

It is a super-2 number, since 2×12011031² = 288529731365922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011731) 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 in 15 ways as a sum of consecutive naturals, for example, 17511 + ... + 18183.

It is an arithmetic number, because the mean of its divisors is an integer number (1115470).

Almost surely, 2^12011031 is an apocalyptic number.

12011031 is a deficient number, since it is larger than the sum of its proper divisors (5836489).

12011031 is an equidigital number, since it uses as much as digits as its factorization.

12011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 12011031 is about 3465.6934371061. The cubic root of 12011031 is about 229.0129789304.

Adding to 12011031 its reverse (13011021), we get a palindrome (25022052).

The spelling of 12011031 in words is "twelve million, eleven thousand, thirty-one".