8321222061 has 6 divisors (see below), whose sum is σ = 12019542990. Its totient is φ = 5547481368.

The previous prime is 8321222047. The next prime is 8321222069. The reversal of 8321222061 is 1602221238.

It can be written as a sum of positive squares in only one way, i.e., 6379057161 + 1942164900 = 79869^2 + 44070^2 .

It is not a de Polignac number, because 8321222061 - 2¹¹ = 8321220013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8321222069) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 462290106 + ... + 462290123.

It is an arithmetic number, because the mean of its divisors is an integer number (2003257165).

Almost surely, 2^8321222061 is an apocalyptic number.

It is an amenable number.

8321222061 is a deficient number, since it is larger than the sum of its proper divisors (3698320929).

8321222061 is a wasteful number, since it uses less digits than its factorization.

8321222061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924580235 (or 924580232 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 8321222061 is about 91220.7326269637. The cubic root of 8321222061 is about 2026.4180129271.

Adding to 8321222061 its reverse (1602221238), we get a palindrome (9923443299).

The spelling of 8321222061 in words is "eight billion, three hundred twenty-one million, two hundred twenty-two thousand, sixty-one".