1111222212211 has 4 divisors (see below), whose sum is σ = 1176588224712. Its totient is φ = 1045856199712.

The previous prime is 1111222212209. The next prime is 1111222212227. The reversal of 1111222212211 is 1122122221111.

It is a happy number.

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 1111222212211 - 2¹ = 1111222212209 is a prime.

It is a super-2 number, since 2×1111222212211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111222212311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32683006225 + ... + 32683006258.

It is an arithmetic number, because the mean of its divisors is an integer number (294147056178).

Almost surely, 2^{1111222212211} is an apocalyptic number.

1111222212211 is a deficient number, since it is larger than the sum of its proper divisors (65366012501).

1111222212211 is an equidigital number, since it uses as much as digits as its factorization.

1111222212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65366012500.

The product of its digits is 64, while the sum is 19.

Adding to 1111222212211 its reverse (1122122221111), we get a palindrome (2233344433322).

The spelling of 1111222212211 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred eleven".