2421023321 has 2 divisors, whose sum is σ = 2421023322. Its totient is φ = 2421023320.

The previous prime is 2421023303. The next prime is 2421023323. The reversal of 2421023321 is 1233201242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1296360025 + 1124663296 = 36005^2 + 33536^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421023321 - 2¹⁴ = 2421006937 is a prime.

It is a super-2 number, since 2×2421023321² = 11722707841651738082, which contains 22 as substring.

Together with 2421023323, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2421023293 and 2421023302.

It is not a weakly prime, because it can be changed into another prime (2421023323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210511660 + 1210511661.

It is an arithmetic number, because the mean of its divisors is an integer number (1210511661).

Almost surely, 2^2421023321 is an apocalyptic number.

It is an amenable number.

2421023321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421023321 is an equidigital number, since it uses as much as digits as its factorization.

2421023321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2421023321 is about 49203.8953844104. The cubic root of 2421023321 is about 1342.7639025902.

Adding to 2421023321 its reverse (1233201242), we get a palindrome (3654224563).

The spelling of 2421023321 in words is "two billion, four hundred twenty-one million, twenty-three thousand, three hundred twenty-one".