11033312261 has 2 divisors, whose sum is σ = 11033312262. Its totient is φ = 11033312260.

The previous prime is 11033312219. The next prime is 11033312281. The reversal of 11033312261 is 16221333011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6778228900 + 4255083361 = 82330^2 + 65231^2 .

It is a cyclic number.

It is not a de Polignac number, because 11033312261 - 2⁶ = 11033312197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11033312281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5516656130 + 5516656131.

It is an arithmetic number, because the mean of its divisors is an integer number (5516656131).

Almost surely, 2^11033312261 is an apocalyptic number.

It is an amenable number.

11033312261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11033312261 is an equidigital number, since it uses as much as digits as its factorization.

11033312261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 11033312261 its reverse (16221333011), we get a palindrome (27254645272).

The spelling of 11033312261 in words is "eleven billion, thirty-three million, three hundred twelve thousand, two hundred sixty-one".