21220344302239 has 2 divisors, whose sum is σ = 21220344302240. Its totient is φ = 21220344302238.

The previous prime is 21220344302233. The next prime is 21220344302263. The reversal of 21220344302239 is 93220344302212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220344302239 - 2²⁹ = 21219807431327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220344302198 and 21220344302207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220344302233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610172151119 + 10610172151120.

It is an arithmetic number, because the mean of its divisors is an integer number (10610172151120).

Almost surely, 2^{21220344302239} is an apocalyptic number.

21220344302239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220344302239 is an equidigital number, since it uses as much as digits as its factorization.

21220344302239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 21220344302239 in words is "twenty-one trillion, two hundred twenty billion, three hundred forty-four million, three hundred two thousand, two hundred thirty-nine".