20121303197 has 2 divisors, whose sum is σ = 20121303198. Its totient is φ = 20121303196.

The previous prime is 20121303161. The next prime is 20121303263. The reversal of 20121303197 is 79130312102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13808365081 + 6312938116 = 117509^2 + 79454^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121303197 - 2⁸ = 20121302941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121303127) 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, 10060651598 + 10060651599.

It is an arithmetic number, because the mean of its divisors is an integer number (10060651599).

Almost surely, 2^20121303197 is an apocalyptic number.

It is an amenable number.

20121303197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121303197 is an equidigital number, since it uses as much as digits as its factorization.

20121303197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

Adding to 20121303197 its reverse (79130312102), we get a palindrome (99251615299).

The spelling of 20121303197 in words is "twenty billion, one hundred twenty-one million, three hundred three thousand, one hundred ninety-seven".