2123111201 has 4 divisors (see below), whose sum is σ = 2123522304. Its totient is φ = 2122700100.

The previous prime is 2123111173. The next prime is 2123111219. The reversal of 2123111201 is 1021113212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123111261) 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, 197705 + ... + 208166.

It is an arithmetic number, because the mean of its divisors is an integer number (530880576).

Almost surely, 2^2123111201 is an apocalyptic number.

It is an amenable number.

2123111201 is a deficient number, since it is larger than the sum of its proper divisors (411103).

2123111201 is an equidigital number, since it uses as much as digits as its factorization.

2123111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411102.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2123111201 is about 46077.2308304221. The cubic root of 2123111201 is about 1285.2597699376.

Adding to 2123111201 its reverse (1021113212), we get a palindrome (3144224413).

The spelling of 2123111201 in words is "two billion, one hundred twenty-three million, one hundred eleven thousand, two hundred one".