12221121222201 has 12 divisors (see below), whose sum is σ = 16747131790032. Its totient is φ = 7927213763088.

The previous prime is 12221121222199. The next prime is 12221121222217. The reversal of 12221121222201 is 10222212112221.

It is not a de Polignac number, because 12221121222201 - 2¹ = 12221121222199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221121220201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1487836315 + ... + 1487844528.

It is an arithmetic number, because the mean of its divisors is an integer number (1395594315836).

Almost surely, 2^{12221121222201} is an apocalyptic number.

It is an amenable number.

12221121222201 is a deficient number, since it is larger than the sum of its proper divisors (4526010567831).

12221121222201 is an equidigital number, since it uses as much as digits as its factorization.

12221121222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975680920 (or 2975680883 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221121222201 its reverse (10222212112221), we get a palindrome (22443333334422).

The spelling of 12221121222201 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred one".