11311442121121 has 2 divisors, whose sum is σ = 11311442121122. Its totient is φ = 11311442121120.

The previous prime is 11311442121113. The next prime is 11311442121139. The reversal of 11311442121121 is 12112124411311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8813654688400 + 2497787432721 = 2968780^2 + 1580439^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311442121121 - 2³ = 11311442121113 is a prime.

It is not a weakly prime, because it can be changed into another prime (11311442121821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655721060560 + 5655721060561.

It is an arithmetic number, because the mean of its divisors is an integer number (5655721060561).

Almost surely, 2^{11311442121121} is an apocalyptic number.

It is an amenable number.

11311442121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311442121121 is an equidigital number, since it uses as much as digits as its factorization.

11311442121121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 25.

Adding to 11311442121121 its reverse (12112124411311), we get a palindrome (23423566532432).

The spelling of 11311442121121 in words is "eleven trillion, three hundred eleven billion, four hundred forty-two million, one hundred twenty-one thousand, one hundred twenty-one".