1211022212211 has 48 divisors (see below), whose sum is σ = 2138864016640. Its totient is φ = 644843540160.

The previous prime is 1211022212177. The next prime is 1211022212227. The reversal of 1211022212211 is 1122122201121.

1211022212211 is a `hidden beast` number, since 121 + 102 + 221 + 221 + 1 = 666.

It is not a de Polignac number, because 1211022212211 - 2¹⁰ = 1211022211187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211022212251) 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 47 ways as a sum of consecutive naturals, for example, 8219725 + ... + 8365758.

Almost surely, 2^{1211022212211} is an apocalyptic number.

1211022212211 is a deficient number, since it is larger than the sum of its proper divisors (927841804429).

1211022212211 is a wasteful number, since it uses less digits than its factorization.

1211022212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16585576 (or 16585573 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211022212211 its reverse (1122122201121), we get a palindrome (2333144413332).

The spelling of 1211022212211 in words is "one trillion, two hundred eleven billion, twenty-two million, two hundred twelve thousand, two hundred eleven".