21321434011 has 2 divisors, whose sum is σ = 21321434012. Its totient is φ = 21321434010.

The previous prime is 21321433999. The next prime is 21321434023. The reversal of 21321434011 is 11043412312.

It is a balanced prime because it is at equal distance from previous prime (21321433999) and next prime (21321434023).

It is a cyclic number.

It is not a de Polignac number, because 21321434011 - 2⁹ = 21321433499 is a prime.

It is not a weakly prime, because it can be changed into another prime (21321434311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660717005 + 10660717006.

It is an arithmetic number, because the mean of its divisors is an integer number (10660717006).

Almost surely, 2^21321434011 is an apocalyptic number.

21321434011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321434011 is an equidigital number, since it uses as much as digits as its factorization.

21321434011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21321434011 its reverse (11043412312), we get a palindrome (32364846323).

The spelling of 21321434011 in words is "twenty-one billion, three hundred twenty-one million, four hundred thirty-four thousand, eleven".