21522246511 has 2 divisors, whose sum is σ = 21522246512. Its totient is φ = 21522246510.

The previous prime is 21522246509. The next prime is 21522246539. The reversal of 21522246511 is 11564222512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21522246511 - 2¹ = 21522246509 is a prime.

Together with 21522246509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21522246541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10761123255 + 10761123256.

It is an arithmetic number, because the mean of its divisors is an integer number (10761123256).

Almost surely, 2^21522246511 is an apocalyptic number.

21522246511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21522246511 is an equidigital number, since it uses as much as digits as its factorization.

21522246511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 31.

The spelling of 21522246511 in words is "twenty-one billion, five hundred twenty-two million, two hundred forty-six thousand, five hundred eleven".