1211102221211 has 8 divisors (see below), whose sum is σ = 1318804597200. Its totient is φ = 1107795860640.

The previous prime is 1211102221187. The next prime is 1211102221213. The reversal of 1211102221211 is 1121222011121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211102221211 - 2¹⁴ = 1211102204827 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 1211102221211.

It is not an unprimeable number, because it can be changed into a prime (1211102221213) 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 7 ways as a sum of consecutive naturals, for example, 1099003280 + ... + 1099004381.

It is an arithmetic number, because the mean of its divisors is an integer number (164850574650).

Almost surely, 2^{1211102221211} is an apocalyptic number.

1211102221211 is a deficient number, since it is larger than the sum of its proper divisors (107702375989).

1211102221211 is a wasteful number, since it uses less digits than its factorization.

1211102221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198007709.

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

Adding to 1211102221211 its reverse (1121222011121), we get a palindrome (2332324232332).

The spelling of 1211102221211 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred twenty-one thousand, two hundred eleven".