105071221515611 has 4 divisors (see below), whose sum is σ = 113153623170672. Its totient is φ = 96988819860552.

The previous prime is 105071221515599. The next prime is 105071221515677. The reversal of 105071221515611 is 116515122170501.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105071221515611 is a prime.

It is a super-2 number, since 2×105071221515611² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105071221511611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4041200827511 + ... + 4041200827536.

It is an arithmetic number, because the mean of its divisors is an integer number (28288405792668).

Almost surely, 2^{105071221515611} is an apocalyptic number.

105071221515611 is a deficient number, since it is larger than the sum of its proper divisors (8082401655061).

105071221515611 is an equidigital number, since it uses as much as digits as its factorization.

105071221515611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082401655060.

The product of its (nonzero) digits is 21000, while the sum is 38.

The spelling of 105071221515611 in words is "one hundred five trillion, seventy-one billion, two hundred twenty-one million, five hundred fifteen thousand, six hundred eleven".