21211011010219 has 2 divisors, whose sum is σ = 21211011010220. Its totient is φ = 21211011010218.

The previous prime is 21211011010201. The next prime is 21211011010229. The reversal of 21211011010219 is 91201011011212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211011010219 - 2¹¹ = 21211011008171 is a prime.

It is a super-2 number, since 2×21211011010219² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21211011010219.

It is not a weakly prime, because it can be changed into another prime (21211011010229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605505505109 + 10605505505110.

It is an arithmetic number, because the mean of its divisors is an integer number (10605505505110).

Almost surely, 2^{21211011010219} is an apocalyptic number.

21211011010219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211011010219 is an equidigital number, since it uses as much as digits as its factorization.

21211011010219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 21211011010219 in words is "twenty-one trillion, two hundred eleven billion, eleven million, ten thousand, two hundred nineteen".