1201111103 has 4 divisors (see below), whose sum is σ = 1201265160. Its totient is φ = 1200957048.

The previous prime is 1201111091. The next prime is 1201111117. The reversal of 1201111103 is 3011111021.

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 1201111103 - 2²⁶ = 1134002239 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 (1201111123) 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, 64673 + ... + 81146.

It is an arithmetic number, because the mean of its divisors is an integer number (300316290).

Almost surely, 2^1201111103 is an apocalyptic number.

1201111103 is a deficient number, since it is larger than the sum of its proper divisors (154057).

1201111103 is an equidigital number, since it uses as much as digits as its factorization.

1201111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154056.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1201111103 is about 34657.0498311671. The cubic root of 1201111103 is about 1062.9864466530.

Adding to 1201111103 its reverse (3011111021), we get a palindrome (4212222124).

The spelling of 1201111103 in words is "one billion, two hundred one million, one hundred eleven thousand, one hundred three".