11250011261 has 2 divisors, whose sum is σ = 11250011262. Its totient is φ = 11250011260.

The previous prime is 11250011251. The next prime is 11250011281. The reversal of 11250011261 is 16211005211.

It is an a-pointer prime, because the next prime (11250011281) can be obtained adding 11250011261 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9485591236 + 1764420025 = 97394^2 + 42005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11250011261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11250011231) 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, 5625005630 + 5625005631.

It is an arithmetic number, because the mean of its divisors is an integer number (5625005631).

Almost surely, 2^11250011261 is an apocalyptic number.

It is an amenable number.

11250011261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11250011261 is an equidigital number, since it uses as much as digits as its factorization.

11250011261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 11250011261 its reverse (16211005211), we get a palindrome (27461016472).

The spelling of 11250011261 in words is "eleven billion, two hundred fifty million, eleven thousand, two hundred sixty-one".