11201012210261 has 2 divisors, whose sum is σ = 11201012210262. Its totient is φ = 11201012210260.

The previous prime is 11201012210191. The next prime is 11201012210287. The reversal of 11201012210261 is 16201221010211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10880663002225 + 320349208036 = 3298585^2 + 565994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11201012210261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201012210291) 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, 5600506105130 + 5600506105131.

It is an arithmetic number, because the mean of its divisors is an integer number (5600506105131).

Almost surely, 2^{11201012210261} is an apocalyptic number.

It is an amenable number.

11201012210261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201012210261 is an equidigital number, since it uses as much as digits as its factorization.

11201012210261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11201012210261 its reverse (16201221010211), we get a palindrome (27402233220472).

The spelling of 11201012210261 in words is "eleven trillion, two hundred one billion, twelve million, two hundred ten thousand, two hundred sixty-one".