10561111042 has 16 divisors (see below), whose sum is σ = 17003307672. Its totient is φ = 4901852160.

The previous prime is 10561111039. The next prime is 10561111087. The reversal of 10561111042 is 24011116501.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9168254001 + 1392857041 = 95751^2 + 37321^2 .

It is a super-2 number, since 2×10561111042² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125059 + ... + 2130022.

Almost surely, 2^10561111042 is an apocalyptic number.

10561111042 is a deficient number, since it is larger than the sum of its proper divisors (6442196630).

10561111042 is a wasteful number, since it uses less digits than its factorization.

10561111042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255173.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 10561111042 its reverse (24011116501), we get a palindrome (34572227543).

The spelling of 10561111042 in words is "ten billion, five hundred sixty-one million, one hundred eleven thousand, forty-two".