21333240011 has 2 divisors, whose sum is σ = 21333240012. Its totient is φ = 21333240010.

The previous prime is 21333239971. The next prime is 21333240017. The reversal of 21333240011 is 11004233312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21333240011 - 2¹⁴ = 21333223627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21333240017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666620005 + 10666620006.

It is an arithmetic number, because the mean of its divisors is an integer number (10666620006).

Almost surely, 2^21333240011 is an apocalyptic number.

21333240011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333240011 is an equidigital number, since it uses as much as digits as its factorization.

21333240011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21333240011 its reverse (11004233312), we get a palindrome (32337473323).

The spelling of 21333240011 in words is "twenty-one billion, three hundred thirty-three million, two hundred forty thousand, eleven".