2231443121 has 4 divisors (see below), whose sum is σ = 2237659200. Its totient is φ = 2225227044.

The previous prime is 2231443117. The next prime is 2231443129. The reversal of 2231443121 is 1213441322.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1213441322 = 2 ⋅606720661.

It is a cyclic number.

It is not a de Polignac number, because 2231443121 - 2² = 2231443117 is a prime.

It is a super-3 number, since 3×2231443121³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231443129) 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, 3107501 + ... + 3108218.

It is an arithmetic number, because the mean of its divisors is an integer number (559414800).

Almost surely, 2^2231443121 is an apocalyptic number.

It is an amenable number.

2231443121 is a deficient number, since it is larger than the sum of its proper divisors (6216079).

2231443121 is an equidigital number, since it uses as much as digits as its factorization.

2231443121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216078.

The product of its digits is 1152, while the sum is 23.

The square root of 2231443121 is about 47238.1532344354. The cubic root of 2231443121 is about 1306.7583195796.

Adding to 2231443121 its reverse (1213441322), we get a palindrome (3444884443).

The spelling of 2231443121 in words is "two billion, two hundred thirty-one million, four hundred forty-three thousand, one hundred twenty-one".