204020021120197 has 2 divisors, whose sum is σ = 204020021120198. Its totient is φ = 204020021120196.

The previous prime is 204020021120147. The next prime is 204020021120299. The reversal of 204020021120197 is 791021120020402.

204020021120197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125836209970276 + 78183811149921 = 11217674^2 + 8842161^2 .

It is a cyclic number.

It is not a de Polignac number, because 204020021120197 - 2¹⁵ = 204020021087429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204020021120147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102010010560098 + 102010010560099.

It is an arithmetic number, because the mean of its divisors is an integer number (102010010560099).

Almost surely, 2^{204020021120197} is an apocalyptic number.

It is an amenable number.

204020021120197 is a deficient number, since it is larger than the sum of its proper divisors (1).

204020021120197 is an equidigital number, since it uses as much as digits as its factorization.

204020021120197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 204020021120197 its reverse (791021120020402), we get a palindrome (995041141140599).

The spelling of 204020021120197 in words is "two hundred four trillion, twenty billion, twenty-one million, one hundred twenty thousand, one hundred ninety-seven".