1002101221273 has 2 divisors, whose sum is σ = 1002101221274. Its totient is φ = 1002101221272.

The previous prime is 1002101221181. The next prime is 1002101221333. The reversal of 1002101221273 is 3721221012001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1001786797449 + 314423824 = 1000893^2 + 17732^2 .

It is an emirp because it is prime and its reverse (3721221012001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002101221273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002101224273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501050610636 + 501050610637.

It is an arithmetic number, because the mean of its divisors is an integer number (501050610637).

Almost surely, 2^{1002101221273} is an apocalyptic number.

It is an amenable number.

1002101221273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002101221273 is an equidigital number, since it uses as much as digits as its factorization.

1002101221273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 1002101221273 its reverse (3721221012001), we get a palindrome (4723322233274).

The spelling of 1002101221273 in words is "one trillion, two billion, one hundred one million, two hundred twenty-one thousand, two hundred seventy-three".