21312040411 has 2 divisors, whose sum is σ = 21312040412. Its totient is φ = 21312040410.

The previous prime is 21312040381. The next prime is 21312040447. The reversal of 21312040411 is 11404021312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21312040411 - 2⁷ = 21312040283 is a prime.

It is not a weakly prime, because it can be changed into another prime (21312040471) 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, 10656020205 + 10656020206.

It is an arithmetic number, because the mean of its divisors is an integer number (10656020206).

Almost surely, 2^21312040411 is an apocalyptic number.

21312040411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312040411 is an equidigital number, since it uses as much as digits as its factorization.

21312040411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21312040411 its reverse (11404021312), we get a palindrome (32716061723).

The spelling of 21312040411 in words is "twenty-one billion, three hundred twelve million, forty thousand, four hundred eleven".