111112222122111 has 12 divisors (see below), whose sum is σ = 172337324107992. Its totient is φ = 63492698355408.

The previous prime is 111112222122091. The next prime is 111112222122131. The reversal of 111112222122111 is 111221222211111.

It is an interprime number because it is at equal distance from previous prime (111112222122091) and next prime (111112222122131).

It is not a de Polignac number, because 111112222122111 - 2⁵ = 111112222122079 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112222122131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377932728160 + ... + 377932728453.

It is an arithmetic number, because the mean of its divisors is an integer number (14361443675666).

Almost surely, 2^{111112222122111} is an apocalyptic number.

111112222122111 is a deficient number, since it is larger than the sum of its proper divisors (61225101985881).

111112222122111 is an equidigital number, since it uses as much as digits as its factorization.

111112222122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755865456630 (or 755865456623 counting only the distinct ones).

The product of its digits is 64, while the sum is 21.

Adding to 111112222122111 its reverse (111221222211111), we get a palindrome (222333444333222).

The spelling of 111112222122111 in words is "one hundred eleven trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred eleven".