105721706071 has 2 divisors, whose sum is σ = 105721706072. Its totient is φ = 105721706070.

The previous prime is 105721706021. The next prime is 105721706201. The reversal of 105721706071 is 170607127501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105721706071 - 2⁹ = 105721705559 is a prime.

It is a super-2 number, since 2×105721706071² (a number of 23 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 105721706071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105721706021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52860853035 + 52860853036.

It is an arithmetic number, because the mean of its divisors is an integer number (52860853036).

Almost surely, 2^105721706071 is an apocalyptic number.

105721706071 is a deficient number, since it is larger than the sum of its proper divisors (1).

105721706071 is an equidigital number, since it uses as much as digits as its factorization.

105721706071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20580, while the sum is 37.

The spelling of 105721706071 in words is "one hundred five billion, seven hundred twenty-one million, seven hundred six thousand, seventy-one".