220230211011221 has 4 divisors (see below), whose sum is σ = 220230246347244. Its totient is φ = 220230175675200.

The previous prime is 220230211011203. The next prime is 220230211011247. The reversal of 220230211011221 is 122110112032022.

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 103752456951025 + 116477754060196 = 10185895^2 + 10792486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220230211011221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220230211011193 and 220230211011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220230211011281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5547890 + ... + 21708051.

It is an arithmetic number, because the mean of its divisors is an integer number (55057561586811).

Almost surely, 2^{220230211011221} is an apocalyptic number.

It is an amenable number.

220230211011221 is a deficient number, since it is larger than the sum of its proper divisors (35336023).

220230211011221 is an equidigital number, since it uses as much as digits as its factorization.

220230211011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35336022.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 220230211011221 its reverse (122110112032022), we get a palindrome (342340323043243).

The spelling of 220230211011221 in words is "two hundred twenty trillion, two hundred thirty billion, two hundred eleven million, eleven thousand, two hundred twenty-one".