1122221221211 has 4 divisors (see below), whose sum is σ = 1122587843424. Its totient is φ = 1121854599000.

The previous prime is 1122221221171. The next prime is 1122221221349. The reversal of 1122221221211 is 1121221222211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1122221221211 - 2¹⁴ = 1122221204827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122421221211) 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 3 ways as a sum of consecutive naturals, for example, 183306515 + ... + 183312636.

It is an arithmetic number, because the mean of its divisors is an integer number (280646960856).

Almost surely, 2^{1122221221211} is an apocalyptic number.

1122221221211 is a deficient number, since it is larger than the sum of its proper divisors (366622213).

1122221221211 is an equidigital number, since it uses as much as digits as its factorization.

1122221221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366622212.

The product of its digits is 128, while the sum is 20.

Adding to 1122221221211 its reverse (1121221222211), we get a palindrome (2243442443422).

The spelling of 1122221221211 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".