105561106011021 has 8 divisors (see below), whose sum is σ = 146867625754560. Its totient is φ = 67314328470752.

The previous prime is 105561106011017. The next prime is 105561106011047. The reversal of 105561106011021 is 120110601165501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105561106011021 - 2² = 105561106011017 is a prime.

It is a super-2 number, since 2×105561106011021² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105561106011021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105561106016021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764935550736 + ... + 764935550873.

It is an arithmetic number, because the mean of its divisors is an integer number (18358453219320).

Almost surely, 2^{105561106011021} is an apocalyptic number.

It is an amenable number.

105561106011021 is a deficient number, since it is larger than the sum of its proper divisors (41306519743539).

105561106011021 is a wasteful number, since it uses less digits than its factorization.

105561106011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529871101635.

The product of its (nonzero) digits is 1800, while the sum is 30.

Adding to 105561106011021 its reverse (120110601165501), we get a palindrome (225671707176522).

The spelling of 105561106011021 in words is "one hundred five trillion, five hundred sixty-one billion, one hundred six million, eleven thousand, twenty-one".