1101200111 has 4 divisors (see below), whose sum is σ = 1201309224. Its totient is φ = 1001091000.

The previous prime is 1101200101. The next prime is 1101200123. The reversal of 1101200111 is 1110021011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1101200111 - 2¹⁸ = 1100937967 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 (1101200101) 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, 50054540 + ... + 50054561.

It is an arithmetic number, because the mean of its divisors is an integer number (300327306).

Almost surely, 2^1101200111 is an apocalyptic number.

1101200111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1101200111 is a deficient number, since it is larger than the sum of its proper divisors (100109113).

1101200111 is a wasteful number, since it uses less digits than its factorization.

1101200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100109112.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1101200111 is about 33184.3353255719. The cubic root of 1101200111 is about 1032.6553883235.

Adding to 1101200111 its reverse (1110021011), we get a palindrome (2211221122).

Subtracting 1101200111 from its reverse (1110021011), we obtain a square (8820900 = 2970²).

The spelling of 1101200111 in words is "one billion, one hundred one million, two hundred thousand, one hundred eleven".