820221002021222 has 16 divisors (see below), whose sum is σ = 1272804109237440. Its totient is φ = 395954018541312.

The previous prime is 820221002021191. The next prime is 820221002021273. The reversal of 820221002021222 is 222120200122028.

It is a junction number, because it is equal to n+sod(n) for n = 820221002021191 and 820221002021200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261661643 + ... + 264777750.

It is an arithmetic number, because the mean of its divisors is an integer number (79550256827340).

Almost surely, 2^{820221002021222} is an apocalyptic number.

820221002021222 is a deficient number, since it is larger than the sum of its proper divisors (452583107216218).

820221002021222 is a wasteful number, since it uses less digits than its factorization.

820221002021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526466287.

The product of its (nonzero) digits is 2048, while the sum is 26.

The spelling of 820221002021222 in words is "eight hundred twenty trillion, two hundred twenty-one billion, two million, twenty-one thousand, two hundred twenty-two".