8223017770421 has 4 divisors (see below), whose sum is σ = 8223171931200. Its totient is φ = 8222863609644.

The previous prime is 8223017770403. The next prime is 8223017770447. The reversal of 8223017770421 is 1240777103228.

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 8223017770421 - 2¹⁰ = 8223017769397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8223017770321) 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, 77000351 + ... + 77107068.

It is an arithmetic number, because the mean of its divisors is an integer number (2055792982800).

Almost surely, 2^{8223017770421} is an apocalyptic number.

It is an amenable number.

8223017770421 is a deficient number, since it is larger than the sum of its proper divisors (154160779).

8223017770421 is a wasteful number, since it uses less digits than its factorization.

8223017770421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154160778.

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 8223017770421 in words is "eight trillion, two hundred twenty-three billion, seventeen million, seven hundred seventy thousand, four hundred twenty-one".