221020211020211 has 8 divisors (see below), whose sum is σ = 224783205385200. Its totient is φ = 217257779625120.

The previous prime is 221020211020183. The next prime is 221020211020223. The reversal of 221020211020211 is 112020112020122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020211020211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221020211020211.

It is not an unprimeable number, because it can be changed into a prime (221020211020811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139950560 + ... + 141521021.

It is an arithmetic number, because the mean of its divisors is an integer number (28097900673150).

Almost surely, 2^{221020211020211} is an apocalyptic number.

221020211020211 is a deficient number, since it is larger than the sum of its proper divisors (3762994364989).

221020211020211 is a wasteful number, since it uses less digits than its factorization.

221020211020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281484949.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221020211020211 its reverse (112020112020122), we get a palindrome (333040323040333).

The spelling of 221020211020211 in words is "two hundred twenty-one trillion, twenty billion, two hundred eleven million, twenty thousand, two hundred eleven".