10002100221973 has 2 divisors, whose sum is σ = 10002100221974. Its totient is φ = 10002100221972.

The previous prime is 10002100221961. The next prime is 10002100222033. The reversal of 10002100221973 is 37912200120001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6509320487569 + 3492779734404 = 2551337^2 + 1868898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10002100221973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002100221073) 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 as a sum of consecutive naturals, namely, 5001050110986 + 5001050110987.

It is an arithmetic number, because the mean of its divisors is an integer number (5001050110987).

Almost surely, 2^{10002100221973} is an apocalyptic number.

It is an amenable number.

10002100221973 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002100221973 is an equidigital number, since it uses as much as digits as its factorization.

10002100221973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

Adding to 10002100221973 its reverse (37912200120001), we get a palindrome (47914300341974).

The spelling of 10002100221973 in words is "ten trillion, two billion, one hundred million, two hundred twenty-one thousand, nine hundred seventy-three".