105061810241721 has 32 divisors (see below), whose sum is σ = 143121812851840. Its totient is φ = 68533516800000.

The previous prime is 105061810241683. The next prime is 105061810241761. The reversal of 105061810241721 is 127142018160501.

It is a happy number.

105061810241721 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 105061810241721 - 2³⁴ = 105044630372537 is a prime.

It is a super-2 number, since 2×105061810241721² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 105061810241721.

It is not an unprimeable number, because it can be changed into a prime (105061810241761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1854254490 + ... + 1854311148.

It is an arithmetic number, because the mean of its divisors is an integer number (4472556651620).

Almost surely, 2^{105061810241721} is an apocalyptic number.

It is an amenable number.

105061810241721 is a deficient number, since it is larger than the sum of its proper divisors (38060002610119).

105061810241721 is a wasteful number, since it uses less digits than its factorization.

105061810241721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109417.

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 105061810241721 in words is "one hundred five trillion, sixty-one billion, eight hundred ten million, two hundred forty-one thousand, seven hundred twenty-one".