2311120221 has 4 divisors (see below), whose sum is σ = 3081493632. Its totient is φ = 1540746812.

The previous prime is 2311120193. The next prime is 2311120241. The reversal of 2311120221 is 1220211132.

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 not a de Polignac number, because 2311120221 - 2⁹ = 2311119709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2311120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311120241) 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, 385186701 + ... + 385186706.

It is an arithmetic number, because the mean of its divisors is an integer number (770373408).

Almost surely, 2^2311120221 is an apocalyptic number.

It is an amenable number.

2311120221 is a deficient number, since it is larger than the sum of its proper divisors (770373411).

2311120221 is an equidigital number, since it uses as much as digits as its factorization.

2311120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770373410.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2311120221 is about 48074.1117546648. Note that the first 3 decimals coincide. The cubic root of 2311120221 is about 1322.1300589641.

Adding to 2311120221 its reverse (1220211132), we get a palindrome (3531331353).

The spelling of 2311120221 in words is "two billion, three hundred eleven million, one hundred twenty thousand, two hundred twenty-one".