20202221197 has 2 divisors, whose sum is σ = 20202221198. Its totient is φ = 20202221196.

The previous prime is 20202221191. The next prime is 20202221203. The reversal of 20202221197 is 79112220202.

It is a balanced prime because it is at equal distance from previous prime (20202221191) and next prime (20202221203).

It can be written as a sum of positive squares in only one way, i.e., 16397058601 + 3805162596 = 128051^2 + 61686^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202221197 - 2⁷ = 20202221069 is a prime.

It is a super-2 number, since 2×20202221197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202221191) 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 as a sum of consecutive naturals, namely, 10101110598 + 10101110599.

It is an arithmetic number, because the mean of its divisors is an integer number (10101110599).

Almost surely, 2^20202221197 is an apocalyptic number.

It is an amenable number.

20202221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202221197 is an equidigital number, since it uses as much as digits as its factorization.

20202221197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 20202221197 its reverse (79112220202), we get a palindrome (99314441399).

The spelling of 20202221197 in words is "twenty billion, two hundred two million, two hundred twenty-one thousand, one hundred ninety-seven".