12013012231 has 8 divisors (see below), whose sum is σ = 13147795584. Its totient is φ = 10885344120.

The previous prime is 12013012223. The next prime is 12013012237. The reversal of 12013012231 is 13221031021.

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 12013012231 - 2³ = 12013012223 is a prime.

It is a super-2 number, since 2×12013012231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013012237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1775275 + ... + 1782028.

It is an arithmetic number, because the mean of its divisors is an integer number (1643474448).

Almost surely, 2^12013012231 is an apocalyptic number.

12013012231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12013012231 is a deficient number, since it is larger than the sum of its proper divisors (1134783353).

12013012231 is a wasteful number, since it uses less digits than its factorization.

12013012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557621.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12013012231 its reverse (13221031021), we get a palindrome (25234043252).

It can be divided in two parts, 12013012 and 231, that multiplied together give a palindrome (2775005772).

The spelling of 12013012231 in words is "twelve billion, thirteen million, twelve thousand, two hundred thirty-one".