12221201211 has 16 divisors (see below), whose sum is σ = 16389276288. Its totient is φ = 8100432000.

The previous prime is 12221201189. The next prime is 12221201219. The reversal of 12221201211 is 11210212221.

It is not a de Polignac number, because 12221201211 - 2¹¹ = 12221199163 is a prime.

It is a super-3 number, since 3×12221201211³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12221201219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352776 + ... + 385866.

It is an arithmetic number, because the mean of its divisors is an integer number (1024329768).

Almost surely, 2^12221201211 is an apocalyptic number.

12221201211 is a deficient number, since it is larger than the sum of its proper divisors (4168075077).

12221201211 is a wasteful number, since it uses less digits than its factorization.

12221201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33802.

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

Adding to 12221201211 its reverse (11210212221), we get a palindrome (23431413432).

The spelling of 12221201211 in words is "twelve billion, two hundred twenty-one million, two hundred one thousand, two hundred eleven".