200102221981 has 2 divisors, whose sum is σ = 200102221982. Its totient is φ = 200102221980.

The previous prime is 200102221973. The next prime is 200102222051. The reversal of 200102221981 is 189122201002.

200102221981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147894084900 + 52208137081 = 384570^2 + 228491^2 .

It is a cyclic number.

It is not a de Polignac number, because 200102221981 - 2³ = 200102221973 is a prime.

It is a super-2 number, since 2×200102221981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200102221931) 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, 100051110990 + 100051110991.

It is an arithmetic number, because the mean of its divisors is an integer number (100051110991).

Almost surely, 2^200102221981 is an apocalyptic number.

It is an amenable number.

200102221981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200102221981 is an equidigital number, since it uses as much as digits as its factorization.

200102221981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

Adding to 200102221981 its reverse (189122201002), we get a palindrome (389224422983).

The spelling of 200102221981 in words is "two hundred billion, one hundred two million, two hundred twenty-one thousand, nine hundred eighty-one".