13121131320023 has 64 divisors (see below), whose sum is σ = 14588451993600. Its totient is φ = 11751283353600.

The previous prime is 13121131319999. The next prime is 13121131320047. The reversal of 13121131320023 is 32002313112131.

It is an interprime number because it is at equal distance from previous prime (13121131319999) and next prime (13121131320047).

It is a cyclic number.

It is not a de Polignac number, because 13121131320023 - 2⁸ = 13121131319767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121131320053) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1532301140 + ... + 1532309702.

It is an arithmetic number, because the mean of its divisors is an integer number (227944562400).

Almost surely, 2^{13121131320023} is an apocalyptic number.

13121131320023 is a deficient number, since it is larger than the sum of its proper divisors (1467320673577).

13121131320023 is a wasteful number, since it uses less digits than its factorization.

13121131320023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9048.

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

Adding to 13121131320023 its reverse (32002313112131), we get a palindrome (45123444432154).

The spelling of 13121131320023 in words is "thirteen trillion, one hundred twenty-one billion, one hundred thirty-one million, three hundred twenty thousand, twenty-three".