21210222019589 has 2 divisors, whose sum is σ = 21210222019590. Its totient is φ = 21210222019588.

The previous prime is 21210222019577. The next prime is 21210222019627. The reversal of 21210222019589 is 98591022201212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13915809552100 + 7294412467489 = 3730390^2 + 2700817^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210222019589 - 2⁸ = 21210222019333 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 (21210222019559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605111009794 + 10605111009795.

It is an arithmetic number, because the mean of its divisors is an integer number (10605111009795).

Almost surely, 2^{21210222019589} is an apocalyptic number.

It is an amenable number.

21210222019589 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210222019589 is an equidigital number, since it uses as much as digits as its factorization.

21210222019589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 21210222019589 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, nineteen thousand, five hundred eighty-nine".