221202211200209 has 4 divisors (see below), whose sum is σ = 221743047902820. Its totient is φ = 220661374497600.

The previous prime is 221202211200193. The next prime is 221202211200221. The reversal of 221202211200209 is 902002112202122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79336483852609 + 141865727347600 = 8907103^2 + 11910740^2 .

It is a cyclic number.

It is not a de Polignac number, because 221202211200209 - 2⁴ = 221202211200193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221202211200259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270418350692 + ... + 270418351509.

It is an arithmetic number, because the mean of its divisors is an integer number (55435761975705).

Almost surely, 2^{221202211200209} is an apocalyptic number.

It is an amenable number.

221202211200209 is a deficient number, since it is larger than the sum of its proper divisors (540836702611).

221202211200209 is an equidigital number, since it uses as much as digits as its factorization.

221202211200209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540836702610.

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

The spelling of 221202211200209 in words is "two hundred twenty-one trillion, two hundred two billion, two hundred eleven million, two hundred thousand, two hundred nine".