21232512011 has 2 divisors, whose sum is σ = 21232512012. Its totient is φ = 21232512010.

The previous prime is 21232512001. The next prime is 21232512047. The reversal of 21232512011 is 11021523212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21232512011 - 2¹⁰ = 21232510987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21232512001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616256005 + 10616256006.

It is an arithmetic number, because the mean of its divisors is an integer number (10616256006).

Almost surely, 2^21232512011 is an apocalyptic number.

21232512011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232512011 is an equidigital number, since it uses as much as digits as its factorization.

21232512011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 21232512011 in words is "twenty-one billion, two hundred thirty-two million, five hundred twelve thousand, eleven".