13123210111321 has 2 divisors, whose sum is σ = 13123210111322. Its totient is φ = 13123210111320.

The previous prime is 13123210111177. The next prime is 13123210111331. The reversal of 13123210111321 is 12311101232131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11959700558400 + 1163509552921 = 3458280^2 + 1078661^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123210111321 - 2²³ = 13123201722713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13123210111292 and 13123210111301.

It is not a weakly prime, because it can be changed into another prime (13123210111331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561605055660 + 6561605055661.

It is an arithmetic number, because the mean of its divisors is an integer number (6561605055661).

Almost surely, 2^{13123210111321} is an apocalyptic number.

It is an amenable number.

13123210111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13123210111321 is an equidigital number, since it uses as much as digits as its factorization.

13123210111321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 13123210111321 its reverse (12311101232131), we get a palindrome (25434311343452).

The spelling of 13123210111321 in words is "thirteen trillion, one hundred twenty-three billion, two hundred ten million, one hundred eleven thousand, three hundred twenty-one".