21000211210189 has 2 divisors, whose sum is σ = 21000211210190. Its totient is φ = 21000211210188.

The previous prime is 21000211210051. The next prime is 21000211210247. The reversal of 21000211210189 is 98101211200012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12834807804900 + 8165403405289 = 3582570^2 + 2857517^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000211210189 - 2¹⁹ = 21000210685901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000211216189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500105605094 + 10500105605095.

It is an arithmetic number, because the mean of its divisors is an integer number (10500105605095).

Almost surely, 2^{21000211210189} is an apocalyptic number.

It is an amenable number.

21000211210189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000211210189 is an equidigital number, since it uses as much as digits as its factorization.

21000211210189 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 21000211210189 in words is "twenty-one trillion, two hundred eleven million, two hundred ten thousand, one hundred eighty-nine".