21602158341089 has 2 divisors, whose sum is σ = 21602158341090. Its totient is φ = 21602158341088.

The previous prime is 21602158341047. The next prime is 21602158341103. The reversal of 21602158341089 is 98014385120612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21601068813025 + 1089528064 = 4647695^2 + 33008^2 .

It is a cyclic number.

It is not a de Polignac number, because 21602158341089 - 2⁴⁰ = 20502646713313 is a prime.

It is not a weakly prime, because it can be changed into another prime (21602158340089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801079170544 + 10801079170545.

It is an arithmetic number, because the mean of its divisors is an integer number (10801079170545).

Almost surely, 2^{21602158341089} is an apocalyptic number.

It is an amenable number.

21602158341089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21602158341089 is an equidigital number, since it uses as much as digits as its factorization.

21602158341089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 21602158341089 in words is "twenty-one trillion, six hundred two billion, one hundred fifty-eight million, three hundred forty-one thousand, eighty-nine".