20122322221 has 8 divisors (see below), whose sum is σ = 21707988984. Its totient is φ = 18581322240.

The previous prime is 20122322197. The next prime is 20122322243. The reversal of 20122322221 is 12222322102.

It can be written as a sum of positive squares in 4 ways, for example, as 11987184196 + 8135138025 = 109486^2 + 90195^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20122322221 - 2⁷ = 20122322093 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 (20122322251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11165760 + ... + 11167561.

It is an arithmetic number, because the mean of its divisors is an integer number (2713498623).

Almost surely, 2^20122322221 is an apocalyptic number.

It is an amenable number.

20122322221 is a deficient number, since it is larger than the sum of its proper divisors (1585666763).

20122322221 is a wasteful number, since it uses less digits than its factorization.

20122322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22333391.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20122322221 its reverse (12222322102), we get a palindrome (32344644323).

The spelling of 20122322221 in words is "twenty billion, one hundred twenty-two million, three hundred twenty-two thousand, two hundred twenty-one".