1112222111111 has 8 divisors (see below), whose sum is σ = 1122449172240. Its totient is φ = 1101995471808.

The previous prime is 1112222111087. The next prime is 1112222111129. The reversal of 1112222111111 is 1111112222111.

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-1112222111111 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1112222111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112222111141) 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, 8140715 + ... + 8276211.

It is an arithmetic number, because the mean of its divisors is an integer number (140306146530).

Almost surely, 2^{1112222111111} is an apocalyptic number.

1112222111111 is a deficient number, since it is larger than the sum of its proper divisors (10227061129).

1112222111111 is a wasteful number, since it uses less digits than its factorization.

1112222111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210913.

The product of its digits is 16, while the sum is 17.

Adding to 1112222111111 its reverse (1111112222111), we get a palindrome (2223334333222).

It can be divided in two parts, 1112222111 and 111, that multiplied together give a palindrome (123456654321).

The spelling of 1112222111111 in words is "one trillion, one hundred twelve billion, two hundred twenty-two million, one hundred eleven thousand, one hundred eleven".