12011231 has 8 divisors (see below), whose sum is σ = 12958704. Its totient is φ = 11090560.

The previous prime is 12011227. The next prime is 12011243. The reversal of 12011231 is 13211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011231 - 2² = 12011227 is a prime.

It is a super-2 number, since 2×12011231² = 288539340270722, 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 (12011281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5765 + ... + 7566.

It is an arithmetic number, because the mean of its divisors is an integer number (1619838).

Almost surely, 2^12011231 is an apocalyptic number.

12011231 is a deficient number, since it is larger than the sum of its proper divisors (947473).

12011231 is a wasteful number, since it uses less digits than its factorization.

12011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13401.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12011231 is about 3465.7222912403. The cubic root of 12011231 is about 229.0142500492.

Adding to 12011231 its reverse (13211021), we get a palindrome (25222252).

The spelling of 12011231 in words is "twelve million, eleven thousand, two hundred thirty-one".