101111050561 has 4 divisors (see below), whose sum is σ = 101111861124. Its totient is φ = 101110240000.

The previous prime is 101111050529. The next prime is 101111050577. The reversal of 101111050561 is 165050111101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 73573307536 + 27537743025 = 271244^2 + 165945^2 .

It is a cyclic number.

It is not a de Polignac number, because 101111050561 - 2⁵ = 101111050529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101111050591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174280 + ... + 482281.

It is an arithmetic number, because the mean of its divisors is an integer number (25277965281).

Almost surely, 2^101111050561 is an apocalyptic number.

It is an amenable number.

101111050561 is a deficient number, since it is larger than the sum of its proper divisors (810563).

101111050561 is an equidigital number, since it uses as much as digits as its factorization.

101111050561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810562.

The product of its (nonzero) digits is 150, while the sum is 22.

Adding to 101111050561 its reverse (165050111101), we get a palindrome (266161161662).

The spelling of 101111050561 in words is "one hundred one billion, one hundred eleven million, fifty thousand, five hundred sixty-one".