21021300320219 has 2 divisors, whose sum is σ = 21021300320220. Its totient is φ = 21021300320218.

The previous prime is 21021300320183. The next prime is 21021300320221. The reversal of 21021300320219 is 91202300312012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021300320219 is a prime.

It is a super-2 number, since 2×21021300320219² (a number of 27 digits) contains 22 as substring.

Together with 21021300320221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21021300320249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510650160109 + 10510650160110.

It is an arithmetic number, because the mean of its divisors is an integer number (10510650160110).

Almost surely, 2^{21021300320219} is an apocalyptic number.

21021300320219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021300320219 is an equidigital number, since it uses as much as digits as its factorization.

21021300320219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 21021300320219 in words is "twenty-one trillion, twenty-one billion, three hundred million, three hundred twenty thousand, two hundred nineteen".