11115142321 has 2 divisors, whose sum is σ = 11115142322. Its totient is φ = 11115142320.

The previous prime is 11115142277. The next prime is 11115142331. The reversal of 11115142321 is 12324151111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9506250000 + 1608892321 = 97500^2 + 40111^2 .

It is a cyclic number.

It is not a de Polignac number, because 11115142321 - 2⁷ = 11115142193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11115142292 and 11115142301.

It is not a weakly prime, because it can be changed into another prime (11115142331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557571160 + 5557571161.

It is an arithmetic number, because the mean of its divisors is an integer number (5557571161).

Almost surely, 2^11115142321 is an apocalyptic number.

It is an amenable number.

11115142321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115142321 is an equidigital number, since it uses as much as digits as its factorization.

11115142321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 22.

Adding to 11115142321 its reverse (12324151111), we get a palindrome (23439293432).

The spelling of 11115142321 in words is "eleven billion, one hundred fifteen million, one hundred forty-two thousand, three hundred twenty-one".