13123021112231 has 4 divisors (see below), whose sum is σ = 13217431336200. Its totient is φ = 13028610888264.

The previous prime is 13123021112219. The next prime is 13123021112233. The reversal of 13123021112231 is 13221112032131.

It is a happy number.

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-13123021112231 is a prime.

It is a super-2 number, since 2×13123021112231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13123021112197 and 13123021112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123021112233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47205111776 + ... + 47205112053.

It is an arithmetic number, because the mean of its divisors is an integer number (3304357834050).

Almost surely, 2^{13123021112231} is an apocalyptic number.

13123021112231 is a deficient number, since it is larger than the sum of its proper divisors (94410223969).

13123021112231 is an equidigital number, since it uses as much as digits as its factorization.

13123021112231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94410223968.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13123021112231 its reverse (13221112032131), we get a palindrome (26344133144362).

The spelling of 13123021112231 in words is "thirteen trillion, one hundred twenty-three billion, twenty-one million, one hundred twelve thousand, two hundred thirty-one".