11220210202181 has 2 divisors, whose sum is σ = 11220210202182. Its totient is φ = 11220210202180.

The previous prime is 11220210202177. The next prime is 11220210202213. The reversal of 11220210202181 is 18120201202211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5779980497281 + 5440229704900 = 2404159^2 + 2332430^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220210202181 - 2² = 11220210202177 is a prime.

It is a super-2 number, since 2×11220210202181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220210232181) 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, 5610105101090 + 5610105101091.

It is an arithmetic number, because the mean of its divisors is an integer number (5610105101091).

Almost surely, 2^{11220210202181} is an apocalyptic number.

It is an amenable number.

11220210202181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220210202181 is an equidigital number, since it uses as much as digits as its factorization.

11220210202181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

Adding to 11220210202181 its reverse (18120201202211), we get a palindrome (29340411404392).

The spelling of 11220210202181 in words is "eleven trillion, two hundred twenty billion, two hundred ten million, two hundred two thousand, one hundred eighty-one".