2343221021 has 2 divisors, whose sum is σ = 2343221022. Its totient is φ = 2343221020.

The previous prime is 2343221017. The next prime is 2343221033. The reversal of 2343221021 is 1201223432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1344028921 + 999192100 = 36661^2 + 31610^2 .

It is a cyclic number.

It is not a de Polignac number, because 2343221021 - 2² = 2343221017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2343220984 and 2343221002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2343221051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1171610510 + 1171610511.

It is an arithmetic number, because the mean of its divisors is an integer number (1171610511).

Almost surely, 2^2343221021 is an apocalyptic number.

It is an amenable number.

2343221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2343221021 is an equidigital number, since it uses as much as digits as its factorization.

2343221021 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 2343221021 is about 48406.8282476760. The cubic root of 2343221021 is about 1328.2232707916.

Adding to 2343221021 its reverse (1201223432), we get a palindrome (3544444453).

The spelling of 2343221021 in words is "two billion, three hundred forty-three million, two hundred twenty-one thousand, twenty-one".