11111251111321 has 2 divisors, whose sum is σ = 11111251111322. Its totient is φ = 11111251111320.

The previous prime is 11111251111253. The next prime is 11111251111381. The reversal of 11111251111321 is 12311115211111.

It is a m-pointer prime, because the next prime (11111251111381) can be obtained adding 11111251111321 to its product of digits (60).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7033294945296 + 4077956166025 = 2652036^2 + 2019395^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111251111321 - 2¹⁹ = 11111250587033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111251111292 and 11111251111301.

It is not a weakly prime, because it can be changed into another prime (11111251111381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555625555660 + 5555625555661.

It is an arithmetic number, because the mean of its divisors is an integer number (5555625555661).

Almost surely, 2^{11111251111321} is an apocalyptic number.

It is an amenable number.

11111251111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111251111321 is an equidigital number, since it uses as much as digits as its factorization.

11111251111321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 22.

Adding to 11111251111321 its reverse (12311115211111), we get a palindrome (23422366322432).

The spelling of 11111251111321 in words is "eleven trillion, one hundred eleven billion, two hundred fifty-one million, one hundred eleven thousand, three hundred twenty-one".