11021221101181 has 2 divisors, whose sum is σ = 11021221101182. Its totient is φ = 11021221101180.

The previous prime is 11021221101083. The next prime is 11021221101193. The reversal of 11021221101181 is 18110112212011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9761506684281 + 1259714416900 = 3124341^2 + 1122370^2 .

It is an emirp because it is prime and its reverse (18110112212011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021221101181 is a prime.

It is a super-2 number, since 2×11021221101181² (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 (11021221104181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510610550590 + 5510610550591.

It is an arithmetic number, because the mean of its divisors is an integer number (5510610550591).

Almost surely, 2^{11021221101181} is an apocalyptic number.

It is an amenable number.

11021221101181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021221101181 is an equidigital number, since it uses as much as digits as its factorization.

11021221101181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 22.

Adding to 11021221101181 its reverse (18110112212011), we get a palindrome (29131333313192).

The spelling of 11021221101181 in words is "eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred one thousand, one hundred eighty-one".