12221001211211 has 32 divisors (see below), whose sum is σ = 13496966930496. Its totient is φ = 10996611840000.

The previous prime is 12221001211187. The next prime is 12221001211231. The reversal of 12221001211211 is 11211210012221.

It is a cyclic number.

It is not a de Polignac number, because 12221001211211 - 2¹⁴ = 12221001194827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221001211211.

It is not an unprimeable number, because it can be changed into a prime (12221001211231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65199656 + ... + 65386826.

It is an arithmetic number, because the mean of its divisors is an integer number (421780216578).

Almost surely, 2^{12221001211211} is an apocalyptic number.

12221001211211 is a deficient number, since it is larger than the sum of its proper divisors (1275965719285).

12221001211211 is a wasteful number, since it uses less digits than its factorization.

12221001211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187983.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12221001211211 its reverse (11211210012221), we get a palindrome (23432211223432).

The spelling of 12221001211211 in words is "twelve trillion, two hundred twenty-one billion, one million, two hundred eleven thousand, two hundred eleven".