20331120321209 has 2 divisors, whose sum is σ = 20331120321210. Its totient is φ = 20331120321208.

The previous prime is 20331120321203. The next prime is 20331120321227. The reversal of 20331120321209 is 90212302113302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13858309155625 + 6472811165584 = 3722675^2 + 2544172^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331120321209 - 2¹² = 20331120317113 is a prime.

It is not a weakly prime, because it can be changed into another prime (20331120321203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165560160604 + 10165560160605.

It is an arithmetic number, because the mean of its divisors is an integer number (10165560160605).

Almost surely, 2^{20331120321209} is an apocalyptic number.

It is an amenable number.

20331120321209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331120321209 is an equidigital number, since it uses as much as digits as its factorization.

20331120321209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 20331120321209 in words is "twenty trillion, three hundred thirty-one billion, one hundred twenty million, three hundred twenty-one thousand, two hundred nine".