2331123221 has 8 divisors (see below), whose sum is σ = 2714408064. Its totient is φ = 1960405200.

The previous prime is 2331123199. The next prime is 2331123229. The reversal of 2331123221 is 1223211332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2331123221 - 2¹⁴ = 2331106837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2331123193 and 2331123202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331123229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3141305 + ... + 3142046.

It is an arithmetic number, because the mean of its divisors is an integer number (339301008).

Almost surely, 2^2331123221 is an apocalyptic number.

It is an amenable number.

2331123221 is a deficient number, since it is larger than the sum of its proper divisors (383284843).

2331123221 is an equidigital number, since it uses as much as digits as its factorization.

2331123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6283411.

The product of its digits is 432, while the sum is 20.

The square root of 2331123221 is about 48281.7068981618. The cubic root of 2331123221 is about 1325.9335006580.

Adding to 2331123221 its reverse (1223211332), we get a palindrome (3554334553).

The spelling of 2331123221 in words is "two billion, three hundred thirty-one million, one hundred twenty-three thousand, two hundred twenty-one".