100560663521 has 2 divisors, whose sum is σ = 100560663522. Its totient is φ = 100560663520.

The previous prime is 100560663479. The next prime is 100560663607. The reversal of 100560663521 is 125366065001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79051507921 + 21509155600 = 281161^2 + 146660^2 .

It is a cyclic number.

It is not a de Polignac number, because 100560663521 - 2¹⁰ = 100560662497 is a prime.

It is a super-2 number, since 2×100560663521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100560663821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280331760 + 50280331761.

It is an arithmetic number, because the mean of its divisors is an integer number (50280331761).

Almost surely, 2^100560663521 is an apocalyptic number.

It is an amenable number.

100560663521 is a deficient number, since it is larger than the sum of its proper divisors (1).

100560663521 is an equidigital number, since it uses as much as digits as its factorization.

100560663521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 100560663521 in words is "one hundred billion, five hundred sixty million, six hundred sixty-three thousand, five hundred twenty-one".