13021123117 has 2 divisors, whose sum is σ = 13021123118. Its totient is φ = 13021123116.

The previous prime is 13021123081. The next prime is 13021123121. The reversal of 13021123117 is 71132112031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11128351081 + 1892772036 = 105491^2 + 43506^2 .

It is an emirp because it is prime and its reverse (71132112031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13021123117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13021123417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510561558 + 6510561559.

It is an arithmetic number, because the mean of its divisors is an integer number (6510561559).

Almost surely, 2^13021123117 is an apocalyptic number.

It is an amenable number.

13021123117 is a deficient number, since it is larger than the sum of its proper divisors (1).

13021123117 is an equidigital number, since it uses as much as digits as its factorization.

13021123117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 13021123117 its reverse (71132112031), we get a palindrome (84153235148).

The spelling of 13021123117 in words is "thirteen billion, twenty-one million, one hundred twenty-three thousand, one hundred seventeen".