70221050171 has 4 divisors (see below), whose sum is σ = 70332336144. Its totient is φ = 70109764200.

The previous prime is 70221050161. The next prime is 70221050173. The reversal of 70221050171 is 17105012207.

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-70221050171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70221050171.

It is not an unprimeable number, because it can be changed into a prime (70221050173) 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, 55642040 + ... + 55643301.

It is an arithmetic number, because the mean of its divisors is an integer number (17583084036).

Almost surely, 2^70221050171 is an apocalyptic number.

70221050171 is a deficient number, since it is larger than the sum of its proper divisors (111285973).

70221050171 is a wasteful number, since it uses less digits than its factorization.

70221050171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111285972.

The product of its (nonzero) digits is 980, while the sum is 26.

Adding to 70221050171 its reverse (17105012207), we get a palindrome (87326062378).

The spelling of 70221050171 in words is "seventy billion, two hundred twenty-one million, fifty thousand, one hundred seventy-one".