13120231231031 has 4 divisors (see below), whose sum is σ = 13120945120200. Its totient is φ = 13119517341864.

The previous prime is 13120231231007. The next prime is 13120231231073. The reversal of 13120231231031 is 13013213202131.

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 13120231231031 - 2³⁴ = 13103051361847 is a prime.

It is a super-2 number, since 2×13120231231031² (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 = 13120231230988 and 13120231231006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120231231231) 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, 356917016 + ... + 356953773.

It is an arithmetic number, because the mean of its divisors is an integer number (3280236280050).

Almost surely, 2^{13120231231031} is an apocalyptic number.

13120231231031 is a deficient number, since it is larger than the sum of its proper divisors (713889169).

13120231231031 is an equidigital number, since it uses as much as digits as its factorization.

13120231231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713889168.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13120231231031 its reverse (13013213202131), we get a palindrome (26133444433162).

The spelling of 13120231231031 in words is "thirteen trillion, one hundred twenty billion, two hundred thirty-one million, two hundred thirty-one thousand, thirty-one".