521321124101 has 2 divisors, whose sum is σ = 521321124102. Its totient is φ = 521321124100.

The previous prime is 521321124073. The next prime is 521321124131. The reversal of 521321124101 is 101421123125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441362251201 + 79958872900 = 664351^2 + 282770^2 .

It is a cyclic number.

It is not a de Polignac number, because 521321124101 - 2¹⁰ = 521321123077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521321124131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260660562050 + 260660562051.

It is an arithmetic number, because the mean of its divisors is an integer number (260660562051).

Almost surely, 2^521321124101 is an apocalyptic number.

It is an amenable number.

521321124101 is a deficient number, since it is larger than the sum of its proper divisors (1).

521321124101 is an equidigital number, since it uses as much as digits as its factorization.

521321124101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 521321124101 its reverse (101421123125), we get a palindrome (622742247226).

The spelling of 521321124101 in words is "five hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-four thousand, one hundred one".