2002020021097 has 4 divisors (see below), whose sum is σ = 2010327158356. Its totient is φ = 1993712883840.

The previous prime is 2002020021061. The next prime is 2002020021151. The reversal of 2002020021097 is 7901200202002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 534520369881 + 1467499651216 = 731109^2 + 1211404^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002020021097 - 2¹¹ = 2002020019049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002020021037) 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 in 3 ways as a sum of consecutive naturals, for example, 4153568268 + ... + 4153568749.

It is an arithmetic number, because the mean of its divisors is an integer number (502581789589).

Almost surely, 2^{2002020021097} is an apocalyptic number.

It is an amenable number.

2002020021097 is a deficient number, since it is larger than the sum of its proper divisors (8307137259).

2002020021097 is an equidigital number, since it uses as much as digits as its factorization.

2002020021097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8307137258.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 2002020021097 its reverse (7901200202002), we get a palindrome (9903220223099).

The spelling of 2002020021097 in words is "two trillion, two billion, twenty million, twenty-one thousand, ninety-seven".