221120201211 has 16 divisors (see below), whose sum is σ = 362863920384. Its totient is φ = 116634831264.

The previous prime is 221120201209. The next prime is 221120201249. The reversal of 221120201211 is 112102021122.

It is not a de Polignac number, because 221120201211 - 2¹ = 221120201209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221120201111) 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 15 ways as a sum of consecutive naturals, for example, 404981781 + ... + 404982326.

It is an arithmetic number, because the mean of its divisors is an integer number (22678995024).

Almost surely, 2^221120201211 is an apocalyptic number.

221120201211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221120201211 is a deficient number, since it is larger than the sum of its proper divisors (141743719173).

221120201211 is a wasteful number, since it uses less digits than its factorization.

221120201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809964130.

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

Adding to 221120201211 its reverse (112102021122), we get a palindrome (333222222333).

The spelling of 221120201211 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred one thousand, two hundred eleven".