11551121131313 has 2 divisors, whose sum is σ = 11551121131314. Its totient is φ = 11551121131312.

The previous prime is 11551121131283. The next prime is 11551121131321. The reversal of 11551121131313 is 31313112115511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10980819767824 + 570301363489 = 3313732^2 + 755183^2 .

It is a cyclic number.

It is not a de Polignac number, because 11551121131313 - 2¹⁶ = 11551121065777 is a prime.

It is not a weakly prime, because it can be changed into another prime (11551121131343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775560565656 + 5775560565657.

It is an arithmetic number, because the mean of its divisors is an integer number (5775560565657).

Almost surely, 2^{11551121131313} is an apocalyptic number.

It is an amenable number.

11551121131313 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551121131313 is an equidigital number, since it uses as much as digits as its factorization.

11551121131313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 29.

Adding to 11551121131313 its reverse (31313112115511), we get a palindrome (42864233246824).

The spelling of 11551121131313 in words is "eleven trillion, five hundred fifty-one billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred thirteen".