1002120020197 has 2 divisors, whose sum is σ = 1002120020198. Its totient is φ = 1002120020196.

The previous prime is 1002120020159. The next prime is 1002120020287. The reversal of 1002120020197 is 7910200212001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 960460760961 + 41659259236 = 980031^2 + 204106^2 .

It is an emirp because it is prime and its reverse (7910200212001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1002120020197 - 2²³ = 1002111631589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002120020137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501060010098 + 501060010099.

It is an arithmetic number, because the mean of its divisors is an integer number (501060010099).

Almost surely, 2^{1002120020197} is an apocalyptic number.

It is an amenable number.

1002120020197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002120020197 is an equidigital number, since it uses as much as digits as its factorization.

1002120020197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 1002120020197 its reverse (7910200212001), we get a palindrome (8912320232198).

The spelling of 1002120020197 in words is "one trillion, two billion, one hundred twenty million, twenty thousand, one hundred ninety-seven".