20222232221 has 4 divisors (see below), whose sum is σ = 20422452444. Its totient is φ = 20022012000.

The previous prime is 20222232197. The next prime is 20222232223. The reversal of 20222232221 is 12223222202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8119812100 + 12102420121 = 90110^2 + 110011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20222232221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20222232193 and 20222232202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222232223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100109960 + ... + 100110161.

It is an arithmetic number, because the mean of its divisors is an integer number (5105613111).

Almost surely, 2^20222232221 is an apocalyptic number.

It is an amenable number.

20222232221 is a deficient number, since it is larger than the sum of its proper divisors (200220223).

20222232221 is a wasteful number, since it uses less digits than its factorization.

20222232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200220222.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20222232221 its reverse (12223222202), we get a palindrome (32445454423).

The spelling of 20222232221 in words is "twenty billion, two hundred twenty-two million, two hundred thirty-two thousand, two hundred twenty-one".