12132001231 has 4 divisors (see below), whose sum is σ = 13865144272. Its totient is φ = 10398858192.

The previous prime is 12132001213. The next prime is 12132001237. The reversal of 12132001231 is 13210023121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12132001231 - 2¹⁹ = 12131476943 is a prime.

It is a super-2 number, since 2×12132001231² (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 (12132001237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866571510 + ... + 866571523.

It is an arithmetic number, because the mean of its divisors is an integer number (3466286068).

Almost surely, 2^12132001231 is an apocalyptic number.

12132001231 is a deficient number, since it is larger than the sum of its proper divisors (1733143041).

12132001231 is an equidigital number, since it uses as much as digits as its factorization.

12132001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733143040.

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

Adding to 12132001231 its reverse (13210023121), we get a palindrome (25342024352).

The spelling of 12132001231 in words is "twelve billion, one hundred thirty-two million, one thousand, two hundred thirty-one".