2421313021 has 2 divisors, whose sum is σ = 2421313022. Its totient is φ = 2421313020.

The previous prime is 2421313019. The next prime is 2421313057. The reversal of 2421313021 is 1203131242.

It is a happy number.

2421313021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2140080121 + 281232900 = 46261^2 + 16770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421313021 - 2¹ = 2421313019 is a prime.

Together with 2421313019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2421313021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421313091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210656510 + 1210656511.

It is an arithmetic number, because the mean of its divisors is an integer number (1210656511).

Almost surely, 2^2421313021 is an apocalyptic number.

It is an amenable number.

2421313021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421313021 is an equidigital number, since it uses as much as digits as its factorization.

2421313021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2421313021 is about 49206.8391689611. The cubic root of 2421313021 is about 1342.8174588949.

Adding to 2421313021 its reverse (1203131242), we get a palindrome (3624444263).

The spelling of 2421313021 in words is "two billion, four hundred twenty-one million, three hundred thirteen thousand, twenty-one".