21321101312219 has 2 divisors, whose sum is σ = 21321101312220. Its totient is φ = 21321101312218.

The previous prime is 21321101312209. The next prime is 21321101312321. The reversal of 21321101312219 is 91221310112312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321101312219 - 2²⁰ = 21321100263643 is a prime.

It is a super-2 number, since 2×21321101312219² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21321101312191 and 21321101312200.

It is not a weakly prime, because it can be changed into another prime (21321101312209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660550656109 + 10660550656110.

It is an arithmetic number, because the mean of its divisors is an integer number (10660550656110).

Almost surely, 2^{21321101312219} is an apocalyptic number.

21321101312219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321101312219 is an equidigital number, since it uses as much as digits as its factorization.

21321101312219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21321101312219 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred one million, three hundred twelve thousand, two hundred nineteen".