13121232231 has 8 divisors (see below), whose sum is σ = 17513812080. Its totient is φ = 8738070272.

The previous prime is 13121232221. The next prime is 13121232233. The reversal of 13121232231 is 13223212131.

13121232231 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 13121232231 - 2¹⁵ = 13121199463 is a prime.

It is a super-2 number, since 2×13121232231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13121232198 and 13121232207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121232233) 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, 2351220 + ... + 2356793.

It is an arithmetic number, because the mean of its divisors is an integer number (2189226510).

Almost surely, 2^13121232231 is an apocalyptic number.

13121232231 is a deficient number, since it is larger than the sum of its proper divisors (4392579849).

13121232231 is an equidigital number, since it uses as much as digits as its factorization.

13121232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708945.

The product of its digits is 432, while the sum is 21.

Adding to 13121232231 its reverse (13223212131), we get a palindrome (26344444362).

The spelling of 13121232231 in words is "thirteen billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred thirty-one".