201122111102989 has 2 divisors, whose sum is σ = 201122111102990. Its totient is φ = 201122111102988.

The previous prime is 201122111102987. The next prime is 201122111103019. The reversal of 201122111102989 is 989201111221102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184994899246089 + 16127211856900 = 13601283^2 + 4015870^2 .

It is a cyclic number.

It is not a de Polignac number, because 201122111102989 - 2¹ = 201122111102987 is a prime.

Together with 201122111102987, 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 (201122111102987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561055551494 + 100561055551495.

It is an arithmetic number, because the mean of its divisors is an integer number (100561055551495).

Almost surely, 2^{201122111102989} is an apocalyptic number.

It is an amenable number.

201122111102989 is a deficient number, since it is larger than the sum of its proper divisors (1).

201122111102989 is an equidigital number, since it uses as much as digits as its factorization.

201122111102989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 40.

The spelling of 201122111102989 in words is "two hundred one trillion, one hundred twenty-two billion, one hundred eleven million, one hundred two thousand, nine hundred eighty-nine".