221101220211 has 16 divisors (see below), whose sum is σ = 295492459680. Its totient is φ = 147055668480.

The previous prime is 221101220201. The next prime is 221101220233. The reversal of 221101220211 is 112022101122.

It is not a de Polignac number, because 221101220211 - 2¹³ = 221101212019 is a prime.

It is a super-2 number, since 2×221101220211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221101220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3357841 + ... + 3423053.

It is an arithmetic number, because the mean of its divisors is an integer number (18468278730).

Almost surely, 2^221101220211 is an apocalyptic number.

221101220211 is a deficient number, since it is larger than the sum of its proper divisors (74391239469).

221101220211 is a wasteful number, since it uses less digits than its factorization.

221101220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67846.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221101220211 its reverse (112022101122), we get a palindrome (333123321333).

The spelling of 221101220211 in words is "two hundred twenty-one billion, one hundred one million, two hundred twenty thousand, two hundred eleven".