21210012016019 has 2 divisors, whose sum is σ = 21210012016020. Its totient is φ = 21210012016018.

The previous prime is 21210012016013. The next prime is 21210012016021. The reversal of 21210012016019 is 91061021001212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21210012016019 - 2²⁸ = 21209743580563 is a prime.

It is a super-3 number, since 3×21210012016019³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 21210012016021, 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 (21210012016013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605006008009 + 10605006008010.

It is an arithmetic number, because the mean of its divisors is an integer number (10605006008010).

Almost surely, 2^{21210012016019} is an apocalyptic number.

21210012016019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210012016019 is an equidigital number, since it uses as much as digits as its factorization.

21210012016019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 21210012016019 in words is "twenty-one trillion, two hundred ten billion, twelve million, sixteen thousand, nineteen".