105520421571 has 16 divisors (see below), whose sum is σ = 143025339936. Its totient is φ = 69186686976.

The previous prime is 105520421563. The next prime is 105520421647. The reversal of 105520421571 is 175124025501.

It is not a de Polignac number, because 105520421571 - 2³ = 105520421563 is a prime.

It is a super-2 number, since 2×105520421571² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105520422571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605170 + ... + 759783.

It is an arithmetic number, because the mean of its divisors is an integer number (8939083746).

Almost surely, 2^105520421571 is an apocalyptic number.

105520421571 is a deficient number, since it is larger than the sum of its proper divisors (37504918365).

105520421571 is a wasteful number, since it uses less digits than its factorization.

105520421571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365382.

The product of its (nonzero) digits is 14000, while the sum is 33.

The spelling of 105520421571 in words is "one hundred five billion, five hundred twenty million, four hundred twenty-one thousand, five hundred seventy-one".