11021122012261 has 2 divisors, whose sum is σ = 11021122012262. Its totient is φ = 11021122012260.

The previous prime is 11021122012249. The next prime is 11021122012273. The reversal of 11021122012261 is 16221022112011.

It is a balanced prime because it is at equal distance from previous prime (11021122012249) and next prime (11021122012273).

It can be written as a sum of positive squares in only one way, i.e., 7717339560100 + 3303782452161 = 2778010^2 + 1817631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021122012261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021122052261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510561006130 + 5510561006131.

It is an arithmetic number, because the mean of its divisors is an integer number (5510561006131).

Almost surely, 2^{11021122012261} is an apocalyptic number.

It is an amenable number.

11021122012261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021122012261 is an equidigital number, since it uses as much as digits as its factorization.

11021122012261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 11021122012261 its reverse (16221022112011), we get a palindrome (27242144124272).

The spelling of 11021122012261 in words is "eleven trillion, twenty-one billion, one hundred twenty-two million, twelve thousand, two hundred sixty-one".