521304321011 has 2 divisors, whose sum is σ = 521304321012. Its totient is φ = 521304321010.

The previous prime is 521304320983. The next prime is 521304321023. The reversal of 521304321011 is 110123403125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521304321011 - 2²⁶ = 521237212147 is a prime.

It is not a weakly prime, because it can be changed into another prime (521304321311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260652160505 + 260652160506.

It is an arithmetic number, because the mean of its divisors is an integer number (260652160506).

Almost surely, 2^521304321011 is an apocalyptic number.

521304321011 is a deficient number, since it is larger than the sum of its proper divisors (1).

521304321011 is an equidigital number, since it uses as much as digits as its factorization.

521304321011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 521304321011 its reverse (110123403125), we get a palindrome (631427724136).

The spelling of 521304321011 in words is "five hundred twenty-one billion, three hundred four million, three hundred twenty-one thousand, eleven".