11313231121 has 2 divisors, whose sum is σ = 11313231122. Its totient is φ = 11313231120.

The previous prime is 11313231113. The next prime is 11313231187. The reversal of 11313231121 is 12113231311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9262137600 + 2051093521 = 96240^2 + 45289^2 .

It is a cyclic number.

It is not a de Polignac number, because 11313231121 - 2³ = 11313231113 is a prime.

It is not a weakly prime, because it can be changed into another prime (11313231101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656615560 + 5656615561.

It is an arithmetic number, because the mean of its divisors is an integer number (5656615561).

Almost surely, 2^11313231121 is an apocalyptic number.

It is an amenable number.

11313231121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11313231121 is an equidigital number, since it uses as much as digits as its factorization.

11313231121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 19.

Adding to 11313231121 its reverse (12113231311), we get a palindrome (23426462432).

The spelling of 11313231121 in words is "eleven billion, three hundred thirteen million, two hundred thirty-one thousand, one hundred twenty-one".