21212020102219 has 2 divisors, whose sum is σ = 21212020102220. Its totient is φ = 21212020102218.

The previous prime is 21212020102181. The next prime is 21212020102241. The reversal of 21212020102219 is 91220102021212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212020102219 - 2²¹ = 21212018005067 is a prime.

It is a super-2 number, since 2×21212020102219² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212020102193 and 21212020102202.

It is not a weakly prime, because it can be changed into another prime (21212020102519) 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, 10606010051109 + 10606010051110.

It is an arithmetic number, because the mean of its divisors is an integer number (10606010051110).

Almost surely, 2^{21212020102219} is an apocalyptic number.

21212020102219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212020102219 is an equidigital number, since it uses as much as digits as its factorization.

21212020102219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 21212020102219 in words is "twenty-one trillion, two hundred twelve billion, twenty million, one hundred two thousand, two hundred nineteen".