8101721222 has 16 divisors (see below), whose sum is σ = 14116349472. Its totient is φ = 3415245120.

The previous prime is 8101721197. The next prime is 8101721279. The reversal of 8101721222 is 2221271018.

It is a junction number, because it is equal to n+sod(n) for n = 8101721191 and 8101721200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4742543 + ... + 4744250.

It is an arithmetic number, because the mean of its divisors is an integer number (882271842).

Almost surely, 2^8101721222 is an apocalyptic number.

8101721222 is a deficient number, since it is larger than the sum of its proper divisors (6014628250).

8101721222 is a wasteful number, since it uses less digits than its factorization.

8101721222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486863.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 8101721222 is about 90009.5618365071. The cubic root of 8101721222 is about 2008.4410923595.

The spelling of 8101721222 in words is "eight billion, one hundred one million, seven hundred twenty-one thousand, two hundred twenty-two".