2123201105 has 4 divisors (see below), whose sum is σ = 2547841332. Its totient is φ = 1698560880.

The previous prime is 2123201071. The next prime is 2123201137. The reversal of 2123201105 is 5011023212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 301960129 + 1821240976 = 17377^2 + 42676^2 .

It is not a de Polignac number, because 2123201105 - 2¹⁶ = 2123135569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212320106 + ... + 212320115.

It is an arithmetic number, because the mean of its divisors is an integer number (636960333).

Almost surely, 2^2123201105 is an apocalyptic number.

It is an amenable number.

2123201105 is a deficient number, since it is larger than the sum of its proper divisors (424640227).

2123201105 is an equidigital number, since it uses as much as digits as its factorization.

2123201105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424640226.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2123201105 is about 46078.2063995551. The cubic root of 2123201105 is about 1285.2779112959.

Adding to 2123201105 its reverse (5011023212), we get a palindrome (7134224317).

The spelling of 2123201105 in words is "two billion, one hundred twenty-three million, two hundred one thousand, one hundred five".