21000011101189 has 2 divisors, whose sum is σ = 21000011101190. Its totient is φ = 21000011101188.

The previous prime is 21000011101141. The next prime is 21000011101207. The reversal of 21000011101189 is 98110111000012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20690717177025 + 309293924164 = 4548705^2 + 556142^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000011101189 - 2¹³ = 21000011092997 is a prime.

It is a super-2 number, since 2×21000011101189² (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 (21000011101129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500005550594 + 10500005550595.

It is an arithmetic number, because the mean of its divisors is an integer number (10500005550595).

Almost surely, 2^{21000011101189} is an apocalyptic number.

It is an amenable number.

21000011101189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000011101189 is an equidigital number, since it uses as much as digits as its factorization.

21000011101189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 21000011101189 in words is "twenty-one trillion, eleven million, one hundred one thousand, one hundred eighty-nine".