11212021189 has 2 divisors, whose sum is σ = 11212021190. Its totient is φ = 11212021188.

The previous prime is 11212021187. The next prime is 11212021207. The reversal of 11212021189 is 98112021211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11195756100 + 16265089 = 105810^2 + 4033^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212021189 - 2¹ = 11212021187 is a prime.

Together with 11212021187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212021187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606010594 + 5606010595.

It is an arithmetic number, because the mean of its divisors is an integer number (5606010595).

Almost surely, 2^11212021189 is an apocalyptic number.

It is an amenable number.

11212021189 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212021189 is an equidigital number, since it uses as much as digits as its factorization.

11212021189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 11212021189 in words is "eleven billion, two hundred twelve million, twenty-one thousand, one hundred eighty-nine".