21343221301 has 2 divisors, whose sum is σ = 21343221302. Its totient is φ = 21343221300.

The previous prime is 21343221287. The next prime is 21343221311. The reversal of 21343221301 is 10312234312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17333039025 + 4010182276 = 131655^2 + 63326^2 .

It is a cyclic number.

It is not a de Polignac number, because 21343221301 - 2¹¹ = 21343219253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343221311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671610650 + 10671610651.

It is an arithmetic number, because the mean of its divisors is an integer number (10671610651).

Almost surely, 2^21343221301 is an apocalyptic number.

It is an amenable number.

21343221301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343221301 is an equidigital number, since it uses as much as digits as its factorization.

21343221301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21343221301 its reverse (10312234312), we get a palindrome (31655455613).

The spelling of 21343221301 in words is "twenty-one billion, three hundred forty-three million, two hundred twenty-one thousand, three hundred one".