1111220111111 has 8 divisors (see below), whose sum is σ = 1212571468800. Its totient is φ = 1009923978040.

The previous prime is 1111220111101. The next prime is 1111220111129. The reversal of 1111220111111 is 1111110221111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111220111111 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 (1111220111101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13764071 + ... + 13844568.

It is an arithmetic number, because the mean of its divisors is an integer number (151571433600).

Almost surely, 2^{1111220111111} is an apocalyptic number.

1111220111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111220111111 is a deficient number, since it is larger than the sum of its proper divisors (101351357689).

1111220111111 is a wasteful number, since it uses less digits than its factorization.

1111220111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27612309.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 1111220111111 its reverse (1111110221111), we get a palindrome (2222330332222).

The spelling of 1111220111111 in words is "one trillion, one hundred eleven billion, two hundred twenty million, one hundred eleven thousand, one hundred eleven".