1000000220209 has 2 divisors, whose sum is σ = 1000000220210. Its totient is φ = 1000000220208.

The previous prime is 1000000220147. The next prime is 1000000220221. The reversal of 1000000220209 is 9020220000001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999794010609 + 206209600 = 999897^2 + 14360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000000220209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000000220192 and 1000000220201.

It is not a weakly prime, because it can be changed into another prime (1000000200209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500000110104 + 500000110105.

It is an arithmetic number, because the mean of its divisors is an integer number (500000110105).

Almost surely, 2^{1000000220209} is an apocalyptic number.

It is an amenable number.

1000000220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000000220209 is an equidigital number, since it uses as much as digits as its factorization.

1000000220209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The spelling of 1000000220209 in words is "one trillion, two hundred twenty thousand, two hundred nine".