1012220111111 has 4 divisors (see below), whose sum is σ = 1104240121224. Its totient is φ = 920200101000.

The previous prime is 1012220111083. The next prime is 1012220111191. The reversal of 1012220111111 is 1111110222101.

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 1012220111111 - 2²² = 1012215916807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012220111191) 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, 46010005040 + ... + 46010005061.

It is an arithmetic number, because the mean of its divisors is an integer number (276060030306).

Almost surely, 2^{1012220111111} is an apocalyptic number.

1012220111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1012220111111 is a deficient number, since it is larger than the sum of its proper divisors (92020010113).

1012220111111 is an equidigital number, since it uses as much as digits as its factorization.

1012220111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92020010112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1012220111111 its reverse (1111110222101), we get a palindrome (2123330333212).

The spelling of 1012220111111 in words is "one trillion, twelve billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".