8221032210021 has 4 divisors (see below), whose sum is σ = 10961376280032. Its totient is φ = 5480688140012.

The previous prime is 8221032209987. The next prime is 8221032210073. The reversal of 8221032210021 is 1200122301228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8221032210021 - 2¹³ = 8221032201829 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8221032209973 and 8221032210000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221037210021) 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, 1370172035001 + ... + 1370172035006.

It is an arithmetic number, because the mean of its divisors is an integer number (2740344070008).

Almost surely, 2^{8221032210021} is an apocalyptic number.

It is an amenable number.

8221032210021 is a deficient number, since it is larger than the sum of its proper divisors (2740344070011).

8221032210021 is a wasteful number, since it uses less digits than its factorization.

8221032210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740344070010.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 8221032210021 its reverse (1200122301228), we get a palindrome (9421154511249).

The spelling of 8221032210021 in words is "eight trillion, two hundred twenty-one billion, thirty-two million, two hundred ten thousand, twenty-one".