105550610521 has 2 divisors, whose sum is σ = 105550610522. Its totient is φ = 105550610520.

The previous prime is 105550610519. The next prime is 105550610569. The reversal of 105550610521 is 125016055501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79318273225 + 26232337296 = 281635^2 + 161964^2 .

It is a cyclic number.

It is not a de Polignac number, because 105550610521 - 2¹ = 105550610519 is a prime.

It is a super-2 number, since 2×105550610521² (a number of 23 digits) contains 22 as substring.

Together with 105550610519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (105550610621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52775305260 + 52775305261.

It is an arithmetic number, because the mean of its divisors is an integer number (52775305261).

Almost surely, 2^105550610521 is an apocalyptic number.

It is an amenable number.

105550610521 is a deficient number, since it is larger than the sum of its proper divisors (1).

105550610521 is an equidigital number, since it uses as much as digits as its factorization.

105550610521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 105550610521 in words is "one hundred five billion, five hundred fifty million, six hundred ten thousand, five hundred twenty-one".