2002221000973 has 2 divisors, whose sum is σ = 2002221000974. Its totient is φ = 2002221000972.

The previous prime is 2002221000947. The next prime is 2002221001003. The reversal of 2002221000973 is 3790001222002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1601991427204 + 400229573769 = 1265698^2 + 632637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002221000973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002221000473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001110500486 + 1001110500487.

It is an arithmetic number, because the mean of its divisors is an integer number (1001110500487).

Almost surely, 2^{2002221000973} is an apocalyptic number.

It is an amenable number.

2002221000973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002221000973 is an equidigital number, since it uses as much as digits as its factorization.

2002221000973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 2002221000973 its reverse (3790001222002), we get a palindrome (5792222222975).

The spelling of 2002221000973 in words is "two trillion, two billion, two hundred twenty-one million, nine hundred seventy-three", and thus it is an aban number.