1020011220209 has 2 divisors, whose sum is σ = 1020011220210. Its totient is φ = 1020011220208.

The previous prime is 1020011220191. The next prime is 1020011220223. The reversal of 1020011220209 is 9020221100201.

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., 1014143660209 + 5867560000 = 1007047^2 + 76600^2 .

It is an emirp because it is prime and its reverse (9020221100201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020011220209 - 2¹² = 1020011216113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1020011220509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510005610104 + 510005610105.

It is an arithmetic number, because the mean of its divisors is an integer number (510005610105).

Almost surely, 2^{1020011220209} is an apocalyptic number.

It is an amenable number.

1020011220209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020011220209 is an equidigital number, since it uses as much as digits as its factorization.

1020011220209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 1020011220209 in words is "one trillion, twenty billion, eleven million, two hundred twenty thousand, two hundred nine".