20321212297 has 2 divisors, whose sum is σ = 20321212298. Its totient is φ = 20321212296.

The previous prime is 20321212279. The next prime is 20321212337. The reversal of 20321212297 is 79221212302.

Together with previous prime (20321212279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13227530121 + 7093682176 = 115011^2 + 84224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20321212297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20321212207) 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 as a sum of consecutive naturals, namely, 10160606148 + 10160606149.

It is an arithmetic number, because the mean of its divisors is an integer number (10160606149).

Almost surely, 2^20321212297 is an apocalyptic number.

It is an amenable number.

20321212297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321212297 is an equidigital number, since it uses as much as digits as its factorization.

20321212297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

Adding to 20321212297 its reverse (79221212302), we get a palindrome (99542424599).

The spelling of 20321212297 in words is "twenty billion, three hundred twenty-one million, two hundred twelve thousand, two hundred ninety-seven".