12211221201 has 16 divisors (see below), whose sum is σ = 16709898240. Its totient is φ = 7929442640.

The previous prime is 12211221181. The next prime is 12211221223. The reversal of 12211221201 is 10212211221.

It is a cyclic number.

It is not a de Polignac number, because 12211221201 - 2⁹ = 12211220689 is a prime.

It is a super-2 number, since 2×12211221201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211221271) 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, 327681 + ... + 363038.

It is an arithmetic number, because the mean of its divisors is an integer number (1044368640).

Almost surely, 2^12211221201 is an apocalyptic number.

It is an amenable number.

12211221201 is a deficient number, since it is larger than the sum of its proper divisors (4498677039).

12211221201 is an equidigital number, since it uses as much as digits as its factorization.

12211221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690876.

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

Adding to 12211221201 its reverse (10212211221), we get a palindrome (22423432422).

The spelling of 12211221201 in words is "twelve billion, two hundred eleven million, two hundred twenty-one thousand, two hundred one".