11105105551061 has 4 divisors (see below), whose sum is σ = 11105144659500. Its totient is φ = 11105066442624.

The previous prime is 11105105551003. The next prime is 11105105551087. The reversal of 11105105551061 is 16015550150111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10543047964036 + 562057587025 = 3247006^2 + 749705^2 .

It is a cyclic number.

It is not a de Polignac number, because 11105105551061 - 2⁴² = 6707059039957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11105105551861) 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, 19125146 + ... + 19697243.

It is an arithmetic number, because the mean of its divisors is an integer number (2776286164875).

Almost surely, 2^{11105105551061} is an apocalyptic number.

It is an amenable number.

11105105551061 is a deficient number, since it is larger than the sum of its proper divisors (39108439).

11105105551061 is an equidigital number, since it uses as much as digits as its factorization.

11105105551061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39108438.

The product of its (nonzero) digits is 3750, while the sum is 32.

The spelling of 11105105551061 in words is "eleven trillion, one hundred five billion, one hundred five million, five hundred fifty-one thousand, sixty-one".