11218331120261 has 2 divisors, whose sum is σ = 11218331120262. Its totient is φ = 11218331120260.

The previous prime is 11218331120233. The next prime is 11218331120273. The reversal of 11218331120261 is 16202113381211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10715841532036 + 502489588225 = 3273506^2 + 708865^2 .

It is a cyclic number.

It is not a de Polignac number, because 11218331120261 - 2⁶ = 11218331120197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11218331120201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609165560130 + 5609165560131.

It is an arithmetic number, because the mean of its divisors is an integer number (5609165560131).

Almost surely, 2^{11218331120261} is an apocalyptic number.

It is an amenable number.

11218331120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11218331120261 is an equidigital number, since it uses as much as digits as its factorization.

11218331120261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 11218331120261 in words is "eleven trillion, two hundred eighteen billion, three hundred thirty-one million, one hundred twenty thousand, two hundred sixty-one".