21302102219 has 2 divisors, whose sum is σ = 21302102220. Its totient is φ = 21302102218.

The previous prime is 21302102209. The next prime is 21302102249. The reversal of 21302102219 is 91220120312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302102219 - 2²⁴ = 21285325003 is a prime.

It is a super-2 number, since 2×21302102219² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21302102194 and 21302102203.

It is not a weakly prime, because it can be changed into another prime (21302102209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651051109 + 10651051110.

It is an arithmetic number, because the mean of its divisors is an integer number (10651051110).

Almost surely, 2^21302102219 is an apocalyptic number.

21302102219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302102219 is an equidigital number, since it uses as much as digits as its factorization.

21302102219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 21302102219 in words is "twenty-one billion, three hundred two million, one hundred two thousand, two hundred nineteen".