221230220211 has 48 divisors (see below), whose sum is σ = 429052565760. Its totient is φ = 106084416960.

The previous prime is 221230220209. The next prime is 221230220243. The reversal of 221230220211 is 112022032122.

221230220211 is a `hidden beast` number, since 2 + 2 + 1 + 230 + 220 + 211 = 666.

It is not a de Polignac number, because 221230220211 - 2¹ = 221230220209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221230220251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12269281 + ... + 12287298.

It is an arithmetic number, because the mean of its divisors is an integer number (8938595120).

Almost surely, 2^221230220211 is an apocalyptic number.

221230220211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221230220211 is a deficient number, since it is larger than the sum of its proper divisors (207822345549).

221230220211 is a wasteful number, since it uses less digits than its factorization.

221230220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24556616 (or 24556613 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221230220211 its reverse (112022032122), we get a palindrome (333252252333).

The spelling of 221230220211 in words is "two hundred twenty-one billion, two hundred thirty million, two hundred twenty thousand, two hundred eleven".