210120020897 has 2 divisors, whose sum is σ = 210120020898. Its totient is φ = 210120020896.

The previous prime is 210120020881. The next prime is 210120020963. The reversal of 210120020897 is 798020021012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133189232401 + 76930788496 = 364951^2 + 277364^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120020897 - 2⁴ = 210120020881 is a prime.

It is not a weakly prime, because it can be changed into another prime (210120020857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060010448 + 105060010449.

It is an arithmetic number, because the mean of its divisors is an integer number (105060010449).

Almost surely, 2^210120020897 is an apocalyptic number.

It is an amenable number.

210120020897 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120020897 is an equidigital number, since it uses as much as digits as its factorization.

210120020897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 210120020897 in words is "two hundred ten billion, one hundred twenty million, twenty thousand, eight hundred ninety-seven".