12003121231 has 8 divisors (see below), whose sum is σ = 12040794320. Its totient is φ = 11965508352.

The previous prime is 12003121211. The next prime is 12003121243. The reversal of 12003121231 is 13212130021.

12003121231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12003121231 - 2⁹ = 12003120719 is a prime.

It is a super-2 number, since 2×12003121231² (a number of 21 digits) 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 (12003121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402181 + ... + 430993.

It is an arithmetic number, because the mean of its divisors is an integer number (1505099290).

Almost surely, 2^12003121231 is an apocalyptic number.

12003121231 is a deficient number, since it is larger than the sum of its proper divisors (37673089).

12003121231 is an equidigital number, since it uses as much as digits as its factorization.

12003121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30105.

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

Adding to 12003121231 its reverse (13212130021), we get a palindrome (25215251252).

The spelling of 12003121231 in words is "twelve billion, three million, one hundred twenty-one thousand, two hundred thirty-one".