11010101321161 has 2 divisors, whose sum is σ = 11010101321162. Its totient is φ = 11010101321160.

The previous prime is 11010101321129. The next prime is 11010101321231. The reversal of 11010101321161 is 16112310101011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9405967617225 + 1604133703936 = 3066915^2 + 1266544^2 .

It is an emirp because it is prime and its reverse (16112310101011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11010101321161 - 2⁵ = 11010101321129 is a prime.

It is a super-2 number, since 2×11010101321161² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11010101321101) 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, 5505050660580 + 5505050660581.

It is an arithmetic number, because the mean of its divisors is an integer number (5505050660581).

Almost surely, 2^{11010101321161} is an apocalyptic number.

It is an amenable number.

11010101321161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11010101321161 is an equidigital number, since it uses as much as digits as its factorization.

11010101321161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 11010101321161 its reverse (16112310101011), we get a palindrome (27122411422172).

The spelling of 11010101321161 in words is "eleven trillion, ten billion, one hundred one million, three hundred twenty-one thousand, one hundred sixty-one".