561056001101 has 2 divisors, whose sum is σ = 561056001102. Its totient is φ = 561056001100.

The previous prime is 561056001089. The next prime is 561056001109. The reversal of 561056001101 is 101100650165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412619946025 + 148436055076 = 642355^2 + 385274^2 .

It is a cyclic number.

It is not a de Polignac number, because 561056001101 - 2¹⁴ = 561055984717 is a prime.

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 (561056001109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280528000550 + 280528000551.

It is an arithmetic number, because the mean of its divisors is an integer number (280528000551).

Almost surely, 2^561056001101 is an apocalyptic number.

It is an amenable number.

561056001101 is a deficient number, since it is larger than the sum of its proper divisors (1).

561056001101 is an equidigital number, since it uses as much as digits as its factorization.

561056001101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 561056001101 its reverse (101100650165), we get a palindrome (662156651266).

The spelling of 561056001101 in words is "five hundred sixty-one billion, fifty-six million, one thousand, one hundred one".