105561106411021 has 4 divisors (see below), whose sum is σ = 105586055861344. Its totient is φ = 105536156960700.

The previous prime is 105561106410989. The next prime is 105561106411067. The reversal of 105561106411021 is 120114601165501.

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 105561106411021 - 2⁵ = 105561106410989 is a prime.

It is a super-2 number, since 2×105561106411021² (a number of 29 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 (105561106411091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12474718815 + ... + 12474727276.

It is an arithmetic number, because the mean of its divisors is an integer number (26396513965336).

Almost surely, 2^{105561106411021} is an apocalyptic number.

It is an amenable number.

105561106411021 is a deficient number, since it is larger than the sum of its proper divisors (24949450323).

105561106411021 is an equidigital number, since it uses as much as digits as its factorization.

105561106411021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24949450322.

The product of its (nonzero) digits is 7200, while the sum is 34.

Adding to 105561106411021 its reverse (120114601165501), we get a palindrome (225675707576522).

The spelling of 105561106411021 in words is "one hundred five trillion, five hundred sixty-one billion, one hundred six million, four hundred eleven thousand, twenty-one".