2321213231 has 2 divisors, whose sum is σ = 2321213232. Its totient is φ = 2321213230.

The previous prime is 2321213227. The next prime is 2321213233. The reversal of 2321213231 is 1323121232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2321213231 - 2² = 2321213227 is a prime.

It is a super-2 number, since 2×2321213231² = 10776061727538918722, which contains 22 as substring.

Together with 2321213233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321213233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160606615 + 1160606616.

It is an arithmetic number, because the mean of its divisors is an integer number (1160606616).

Almost surely, 2^2321213231 is an apocalyptic number.

2321213231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321213231 is an equidigital number, since it uses as much as digits as its factorization.

2321213231 is an evil number, because the sum of its binary digits is even.

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

The square root of 2321213231 is about 48178.9708379081. The cubic root of 2321213231 is about 1324.0519110161.

Adding to 2321213231 its reverse (1323121232), we get a palindrome (3644334463).

The spelling of 2321213231 in words is "two billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred thirty-one".