20310221321189 has 2 divisors, whose sum is σ = 20310221321190. Its totient is φ = 20310221321188.

The previous prime is 20310221321149. The next prime is 20310221321209. The reversal of 20310221321189 is 98112312201302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18804078758689 + 1506142562500 = 4336367^2 + 1227250^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310221321189 - 2³² = 20305926353893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310221321149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155110660594 + 10155110660595.

It is an arithmetic number, because the mean of its divisors is an integer number (10155110660595).

Almost surely, 2^{20310221321189} is an apocalyptic number.

It is an amenable number.

20310221321189 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310221321189 is an equidigital number, since it uses as much as digits as its factorization.

20310221321189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 20310221321189 in words is "twenty trillion, three hundred ten billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred eighty-nine".