8101721223 has 16 divisors (see below), whose sum is σ = 12006466560. Its totient is φ = 5399385048.

The previous prime is 8101721197. The next prime is 8101721279. The reversal of 8101721223 is 3221271018.

It is not a de Polignac number, because 8101721223 - 2²² = 8097526919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8101721123) 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, 38136 + ... + 132882.

It is an arithmetic number, because the mean of its divisors is an integer number (750404160).

Almost surely, 2^8101721223 is an apocalyptic number.

8101721223 is a deficient number, since it is larger than the sum of its proper divisors (3904745337).

8101721223 is a wasteful number, since it uses less digits than its factorization.

8101721223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97923 (or 97917 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 8101721223 is about 90009.5618420621. The cubic root of 8101721223 is about 2008.4410924421.

The spelling of 8101721223 in words is "eight billion, one hundred one million, seven hundred twenty-one thousand, two hundred twenty-three".