21343203311 has 2 divisors, whose sum is σ = 21343203312. Its totient is φ = 21343203310.

The previous prime is 21343203307. The next prime is 21343203337. The reversal of 21343203311 is 11330234312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21343203311 - 2² = 21343203307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343203611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671601655 + 10671601656.

It is an arithmetic number, because the mean of its divisors is an integer number (10671601656).

Almost surely, 2^21343203311 is an apocalyptic number.

21343203311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343203311 is an equidigital number, since it uses as much as digits as its factorization.

21343203311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21343203311 its reverse (11330234312), we get a palindrome (32673437623).

The spelling of 21343203311 in words is "twenty-one billion, three hundred forty-three million, two hundred three thousand, three hundred eleven".