11121331343281 has 2 divisors, whose sum is σ = 11121331343282. Its totient is φ = 11121331343280.

The previous prime is 11121331343179. The next prime is 11121331343351. The reversal of 11121331343281 is 18234313312111.

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., 8745972254881 + 2375359088400 = 2957359^2 + 1541220^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121331343281 - 2⁴¹ = 8922308087729 is a prime.

It is a super-2 number, since 2×11121331343281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11121331343081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560665671640 + 5560665671641.

It is an arithmetic number, because the mean of its divisors is an integer number (5560665671641).

Almost surely, 2^{11121331343281} is an apocalyptic number.

It is an amenable number.

11121331343281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121331343281 is an equidigital number, since it uses as much as digits as its factorization.

11121331343281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

Adding to 11121331343281 its reverse (18234313312111), we get a palindrome (29355644655392).

The spelling of 11121331343281 in words is "eleven trillion, one hundred twenty-one billion, three hundred thirty-one million, three hundred forty-three thousand, two hundred eighty-one".