1111122221011 has 4 divisors (see below), whose sum is σ = 1212133332024. Its totient is φ = 1010111110000.

The previous prime is 1111122220987. The next prime is 1111122221071. The reversal of 1111122221011 is 1101222211111.

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 1111122221011 - 2⁹ = 1111122220499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111122221071) 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, 50505555490 + ... + 50505555511.

It is an arithmetic number, because the mean of its divisors is an integer number (303033333006).

Almost surely, 2^{1111122221011} is an apocalyptic number.

1111122221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111122221011 is a deficient number, since it is larger than the sum of its proper divisors (101011111013).

1111122221011 is a wasteful number, since it uses less digits than its factorization.

1111122221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101011111012.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1111122221011 its reverse (1101222211111), we get a palindrome (2212344432122).

The spelling of 1111122221011 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, eleven".