221020011211 has 8 divisors (see below), whose sum is σ = 240157568000. Its totient is φ = 202632946920.

The previous prime is 221020011209. The next prime is 221020011217. The reversal of 221020011211 is 112110020122.

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

It is a cyclic number.

It is not a de Polignac number, because 221020011211 - 2¹ = 221020011209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221020011191 and 221020011200.

It is not an unprimeable number, because it can be changed into a prime (221020011217) 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 7 ways as a sum of consecutive naturals, for example, 187622511 + ... + 187623688.

It is an arithmetic number, because the mean of its divisors is an integer number (30019696000).

Almost surely, 2^221020011211 is an apocalyptic number.

221020011211 is a deficient number, since it is larger than the sum of its proper divisors (19137556789).

221020011211 is a wasteful number, since it uses less digits than its factorization.

221020011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375246249.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221020011211 its reverse (112110020122), we get a palindrome (333130031333).

The spelling of 221020011211 in words is "two hundred twenty-one billion, twenty million, eleven thousand, two hundred eleven".