1000221118973 has 2 divisors, whose sum is σ = 1000221118974. Its totient is φ = 1000221118972.

The previous prime is 1000221118961. The next prime is 1000221118993. The reversal of 1000221118973 is 3798111220001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 849709709209 + 150511409764 = 921797^2 + 387958^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000221118973 - 2⁶ = 1000221118909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000221118993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500110559486 + 500110559487.

It is an arithmetic number, because the mean of its divisors is an integer number (500110559487).

Almost surely, 2^{1000221118973} is an apocalyptic number.

It is an amenable number.

1000221118973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000221118973 is an equidigital number, since it uses as much as digits as its factorization.

1000221118973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

Adding to 1000221118973 its reverse (3798111220001), we get a palindrome (4798332338974).

The spelling of 1000221118973 in words is "one trillion, two hundred twenty-one million, one hundred eighteen thousand, nine hundred seventy-three".