2331211021 has 2 divisors, whose sum is σ = 2331211022. Its totient is φ = 2331211020.

The previous prime is 2331211007. The next prime is 2331211027. The reversal of 2331211021 is 1201121332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1360576996 + 970634025 = 36886^2 + 31155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2331211021 - 2¹¹ = 2331208973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2331210986 and 2331211004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331211027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165605510 + 1165605511.

It is an arithmetic number, because the mean of its divisors is an integer number (1165605511).

Almost surely, 2^2331211021 is an apocalyptic number.

It is an amenable number.

2331211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331211021 is an equidigital number, since it uses as much as digits as its factorization.

2331211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2331211021 is about 48282.6161366594. The cubic root of 2331211021 is about 1325.9501472112.

Adding to 2331211021 its reverse (1201121332), we get a palindrome (3532332353).

The spelling of 2331211021 in words is "two billion, three hundred thirty-one million, two hundred eleven thousand, twenty-one".