201211103 has 4 divisors (see below), whose sum is σ = 201242328. Its totient is φ = 201179880.

The previous prime is 201211097. The next prime is 201211139. The reversal of 201211103 is 301112102.

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 201211103 - 2¹² = 201207007 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 (201211403) 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, 1976 + ... + 20157.

It is an arithmetic number, because the mean of its divisors is an integer number (50310582).

Almost surely, 2^201211103 is an apocalyptic number.

201211103 is a deficient number, since it is larger than the sum of its proper divisors (31225).

201211103 is an equidigital number, since it uses as much as digits as its factorization.

201211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31224.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 201211103 is about 14184.8899537501. The cubic root of 201211103 is about 585.9816018095.

Adding to 201211103 its reverse (301112102), we get a palindrome (502323205).

Subtracting 201211103 from its reverse (301112102), we obtain a palindrome (99900999).

The spelling of 201211103 in words is "two hundred one million, two hundred eleven thousand, one hundred three".