202221021021209 has 2 divisors, whose sum is σ = 202221021021210. Its totient is φ = 202221021021208.

The previous prime is 202221021021191. The next prime is 202221021021301. The reversal of 202221021021209 is 902120120122202.

202221021021209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160603104093184 + 41617916928025 = 12672928^2 + 6451195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202221021021209 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 (202221021026209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110510510604 + 101110510510605.

It is an arithmetic number, because the mean of its divisors is an integer number (101110510510605).

Almost surely, 2^{202221021021209} is an apocalyptic number.

It is an amenable number.

202221021021209 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221021021209 is an equidigital number, since it uses as much as digits as its factorization.

202221021021209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 202221021021209 in words is "two hundred two trillion, two hundred twenty-one billion, twenty-one million, twenty-one thousand, two hundred nine".