11043131233261 has 2 divisors, whose sum is σ = 11043131233262. Its totient is φ = 11043131233260.

The previous prime is 11043131233259. The next prime is 11043131233279. The reversal of 11043131233261 is 16233213134011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8178490357636 + 2864640875625 = 2859806^2 + 1692525^2 .

It is a cyclic number.

It is not a de Polignac number, because 11043131233261 - 2¹ = 11043131233259 is a prime.

It is a super-2 number, since 2×11043131233261² (a number of 27 digits) contains 22 as substring.

Together with 11043131233259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11043131233201) 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, 5521565616630 + 5521565616631.

It is an arithmetic number, because the mean of its divisors is an integer number (5521565616631).

Almost surely, 2^{11043131233261} is an apocalyptic number.

It is an amenable number.

11043131233261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11043131233261 is an equidigital number, since it uses as much as digits as its factorization.

11043131233261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 11043131233261 its reverse (16233213134011), we get a palindrome (27276344367272).

The spelling of 11043131233261 in words is "eleven trillion, forty-three billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred sixty-one".