11021123221181 has 2 divisors, whose sum is σ = 11021123221182. Its totient is φ = 11021123221180.

The previous prime is 11021123221177. The next prime is 11021123221237. The reversal of 11021123221181 is 18112232112011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6489802105081 + 4531321116100 = 2547509^2 + 2128690^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021123221181 - 2² = 11021123221177 is a prime.

It is a super-2 number, since 2×11021123221181² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11021123221181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021123251181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510561610590 + 5510561610591.

It is an arithmetic number, because the mean of its divisors is an integer number (5510561610591).

Almost surely, 2^{11021123221181} is an apocalyptic number.

It is an amenable number.

11021123221181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021123221181 is an equidigital number, since it uses as much as digits as its factorization.

11021123221181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 26.

Adding to 11021123221181 its reverse (18112232112011), we get a palindrome (29133355333192).

The spelling of 11021123221181 in words is "eleven trillion, twenty-one billion, one hundred twenty-three million, two hundred twenty-one thousand, one hundred eighty-one".