105042205561 has 2 divisors, whose sum is σ = 105042205562. Its totient is φ = 105042205560.

The previous prime is 105042205549. The next prime is 105042205577. The reversal of 105042205561 is 165502240501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94814726400 + 10227479161 = 307920^2 + 101131^2 .

It is a cyclic number.

It is not a de Polignac number, because 105042205561 - 2⁵ = 105042205529 is a prime.

It is a super-2 number, since 2×105042205561² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105042205061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52521102780 + 52521102781.

It is an arithmetic number, because the mean of its divisors is an integer number (52521102781).

Almost surely, 2^105042205561 is an apocalyptic number.

It is an amenable number.

105042205561 is a deficient number, since it is larger than the sum of its proper divisors (1).

105042205561 is an equidigital number, since it uses as much as digits as its factorization.

105042205561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 105042205561 in words is "one hundred five billion, forty-two million, two hundred five thousand, five hundred sixty-one".