221220101211 has 8 divisors (see below), whose sum is σ = 295153811520. Its totient is φ = 147383229192.

The previous prime is 221220101209. The next prime is 221220101239. The reversal of 221220101211 is 112101022122.

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

It is not a de Polignac number, because 221220101211 - 2¹ = 221220101209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221220101251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24204241 + ... + 24213378.

It is an arithmetic number, because the mean of its divisors is an integer number (36894226440).

Almost surely, 2^221220101211 is an apocalyptic number.

221220101211 is a deficient number, since it is larger than the sum of its proper divisors (73933710309).

221220101211 is a wasteful number, since it uses less digits than its factorization.

221220101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48419145.

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

Adding to 221220101211 its reverse (112101022122), we get a palindrome (333321123333).

The spelling of 221220101211 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred one thousand, two hundred eleven".