105355655621 has 2 divisors, whose sum is σ = 105355655622. Its totient is φ = 105355655620.

The previous prime is 105355655597. The next prime is 105355655659. The reversal of 105355655621 is 126556553501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69426453121 + 35929202500 = 263489^2 + 189550^2 .

It is a cyclic number.

It is not a de Polignac number, because 105355655621 - 2²⁶ = 105288546757 is a prime.

It is a super-2 number, since 2×105355655621² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105355657621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52677827810 + 52677827811.

It is an arithmetic number, because the mean of its divisors is an integer number (52677827811).

Almost surely, 2^105355655621 is an apocalyptic number.

It is an amenable number.

105355655621 is a deficient number, since it is larger than the sum of its proper divisors (1).

105355655621 is an equidigital number, since it uses as much as digits as its factorization.

105355655621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 105355655621 in words is "one hundred five billion, three hundred fifty-five million, six hundred fifty-five thousand, six hundred twenty-one".