404440212120209 has 2 divisors, whose sum is σ = 404440212120210. Its totient is φ = 404440212120208.

The previous prime is 404440212120187. The next prime is 404440212120251. The reversal of 404440212120209 is 902021212044404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241896275590225 + 162543936529984 = 15553015^2 + 12749272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404440212120209 is a prime.

It is not a weakly prime, because it can be changed into another prime (404440212120299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202220106060104 + 202220106060105.

It is an arithmetic number, because the mean of its divisors is an integer number (202220106060105).

Almost surely, 2^{404440212120209} is an apocalyptic number.

It is an amenable number.

404440212120209 is a deficient number, since it is larger than the sum of its proper divisors (1).

404440212120209 is an equidigital number, since it uses as much as digits as its factorization.

404440212120209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 404440212120209 in words is "four hundred four trillion, four hundred forty billion, two hundred twelve million, one hundred twenty thousand, two hundred nine".