1111112122211 has 16 divisors (see below), whose sum is σ = 1367663521728. Its totient is φ = 879031094400.

The previous prime is 1111112122193. The next prime is 1111112122279. The reversal of 1111112122211 is 1122212111111.

It is a cyclic number.

It is not a de Polignac number, because 1111112122211 - 2¹⁰ = 1111112121187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111112122211.

It is not an unprimeable number, because it can be changed into a prime (1111112122111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265901 + ... + 1514241.

It is an arithmetic number, because the mean of its divisors is an integer number (85478970108).

Almost surely, 2^{1111112122211} is an apocalyptic number.

1111112122211 is a deficient number, since it is larger than the sum of its proper divisors (256551399517).

1111112122211 is a wasteful number, since it uses less digits than its factorization.

1111112122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258142.

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

Adding to 1111112122211 its reverse (1122212111111), we get a palindrome (2233324233322).

It can be divided in two parts, 111111 and 2122211, that added together give a palindrome (2233322).

The spelling of 1111112122211 in words is "one trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-two thousand, two hundred eleven".