13212203231 has 4 divisors (see below), whose sum is σ = 13213022712. Its totient is φ = 13211383752.

The previous prime is 13212203197. The next prime is 13212203233. The reversal of 13212203231 is 13230221231.

13212203231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13212203231 is a prime.

It is a super-2 number, since 2×13212203231² (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 (13212203233) 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 3 ways as a sum of consecutive naturals, for example, 385061 + ... + 417966.

It is an arithmetic number, because the mean of its divisors is an integer number (3303255678).

Almost surely, 2^13212203231 is an apocalyptic number.

13212203231 is a deficient number, since it is larger than the sum of its proper divisors (819481).

13212203231 is an equidigital number, since it uses as much as digits as its factorization.

13212203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819480.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13212203231 its reverse (13230221231), we get a palindrome (26442424462).

The spelling of 13212203231 in words is "thirteen billion, two hundred twelve million, two hundred three thousand, two hundred thirty-one".