11521213114121 has 2 divisors, whose sum is σ = 11521213114122. Its totient is φ = 11521213114120.

The previous prime is 11521213114093. The next prime is 11521213114129. The reversal of 11521213114121 is 12141131212511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10889577604096 + 631635510025 = 3299936^2 + 794755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11521213114121 is a prime.

It is not a weakly prime, because it can be changed into another prime (11521213114129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760606557060 + 5760606557061.

It is an arithmetic number, because the mean of its divisors is an integer number (5760606557061).

Almost surely, 2^{11521213114121} is an apocalyptic number.

It is an amenable number.

11521213114121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521213114121 is an equidigital number, since it uses as much as digits as its factorization.

11521213114121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 26.

Adding to 11521213114121 its reverse (12141131212511), we get a palindrome (23662344326632).

The spelling of 11521213114121 in words is "eleven trillion, five hundred twenty-one billion, two hundred thirteen million, one hundred fourteen thousand, one hundred twenty-one".