21213543315319 has 2 divisors, whose sum is σ = 21213543315320. Its totient is φ = 21213543315318.

The previous prime is 21213543315301. The next prime is 21213543315331. The reversal of 21213543315319 is 91351334531212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21213543315319 - 2¹¹ = 21213543313271 is a prime.

It is a super-2 number, since 2×21213543315319² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21213543325319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606771657659 + 10606771657660.

It is an arithmetic number, because the mean of its divisors is an integer number (10606771657660).

Almost surely, 2^{21213543315319} is an apocalyptic number.

21213543315319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213543315319 is an equidigital number, since it uses as much as digits as its factorization.

21213543315319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 43.

The spelling of 21213543315319 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, three hundred nineteen".