10561111061 has 4 divisors (see below), whose sum is σ = 10562137824. Its totient is φ = 10560084300.

The previous prime is 10561111039. The next prime is 10561111087. The reversal of 10561111061 is 16011116501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10561111061 - 2¹⁰ = 10561110037 is a prime.

It is a super-2 number, since 2×10561111061² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10561111361) 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, 497795 + ... + 518576.

It is an arithmetic number, because the mean of its divisors is an integer number (2640534456).

Almost surely, 2^10561111061 is an apocalyptic number.

It is an amenable number.

10561111061 is a deficient number, since it is larger than the sum of its proper divisors (1026763).

10561111061 is a wasteful number, since it uses less digits than its factorization.

10561111061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026762.

The product of its (nonzero) digits is 180, while the sum is 23.

Adding to 10561111061 its reverse (16011116501), we get a palindrome (26572227562).

The spelling of 10561111061 in words is "ten billion, five hundred sixty-one million, one hundred eleven thousand, sixty-one".