11012261261 has 2 divisors, whose sum is σ = 11012261262. Its totient is φ = 11012261260.

The previous prime is 11012261237. The next prime is 11012261269. The reversal of 11012261261 is 16216221011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8336785636 + 2675475625 = 91306^2 + 51725^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012261261 - 2¹⁴ = 11012244877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012261269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506130630 + 5506130631.

It is an arithmetic number, because the mean of its divisors is an integer number (5506130631).

Almost surely, 2^11012261261 is an apocalyptic number.

It is an amenable number.

11012261261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012261261 is an equidigital number, since it uses as much as digits as its factorization.

11012261261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 11012261261 its reverse (16216221011), we get a palindrome (27228482272).

The spelling of 11012261261 in words is "eleven billion, twelve million, two hundred sixty-one thousand, two hundred sixty-one".