11101220012173 has 2 divisors, whose sum is σ = 11101220012174. Its totient is φ = 11101220012172.

The previous prime is 11101220012123. The next prime is 11101220012209. The reversal of 11101220012173 is 37121002210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9888748151044 + 1212471861129 = 3144638^2 + 1101123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101220012173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101220012123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550610006086 + 5550610006087.

It is an arithmetic number, because the mean of its divisors is an integer number (5550610006087).

Almost surely, 2^{11101220012173} is an apocalyptic number.

It is an amenable number.

11101220012173 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101220012173 is an equidigital number, since it uses as much as digits as its factorization.

11101220012173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 22.

Adding to 11101220012173 its reverse (37121002210111), we get a palindrome (48222222222284).

The spelling of 11101220012173 in words is "eleven trillion, one hundred one billion, two hundred twenty million, twelve thousand, one hundred seventy-three".