1101122111 has 4 divisors (see below), whose sum is σ = 1101517752. Its totient is φ = 1100726472.

The previous prime is 1101122107. The next prime is 1101122137. The reversal of 1101122111 is 1112211011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1112211011 = 20533 ⋅54167.

It is a cyclic number.

It is not a de Polignac number, because 1101122111 - 2² = 1101122107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101122092 and 1101122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101122161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193616 + ... + 199221.

It is an arithmetic number, because the mean of its divisors is an integer number (275379438).

Almost surely, 2^1101122111 is an apocalyptic number.

1101122111 is a deficient number, since it is larger than the sum of its proper divisors (395641).

1101122111 is an equidigital number, since it uses as much as digits as its factorization.

1101122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395640.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1101122111 is about 33183.1600514478. The cubic root of 1101122111 is about 1032.6310061302.

Adding to 1101122111 its reverse (1112211011), we get a palindrome (2213333122).

Subtracting 1101122111 from its reverse (1112211011), we obtain a square (11088900 = 3330²).

The spelling of 1101122111 in words is "one billion, one hundred one million, one hundred twenty-two thousand, one hundred eleven".