11211221201189 has 2 divisors, whose sum is σ = 11211221201190. Its totient is φ = 11211221201188.

The previous prime is 11211221201179. The next prime is 11211221201227. The reversal of 11211221201189 is 98110212211211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9386717250625 + 1824503950564 = 3063775^2 + 1350742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211221201189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211221201119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605610600594 + 5605610600595.

It is an arithmetic number, because the mean of its divisors is an integer number (5605610600595).

Almost surely, 2^{11211221201189} is an apocalyptic number.

It is an amenable number.

11211221201189 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211221201189 is an equidigital number, since it uses as much as digits as its factorization.

11211221201189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 32.

The spelling of 11211221201189 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred eighty-nine".