200120110211981 has 2 divisors, whose sum is σ = 200120110211982. Its totient is φ = 200120110211980.

The previous prime is 200120110211951. The next prime is 200120110212017. The reversal of 200120110211981 is 189112011021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161388033491881 + 38732076720100 = 12703859^2 + 6223510^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120110211981 - 2³⁴ = 200102930342797 is a prime.

It is a super-2 number, since 2×200120110211981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200120110211951) 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, 100060055105990 + 100060055105991.

It is an arithmetic number, because the mean of its divisors is an integer number (100060055105991).

Almost surely, 2^{200120110211981} is an apocalyptic number.

It is an amenable number.

200120110211981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120110211981 is an equidigital number, since it uses as much as digits as its factorization.

200120110211981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 29.

Adding to 200120110211981 its reverse (189112011021002), we get a palindrome (389232121232983).

The spelling of 200120110211981 in words is "two hundred trillion, one hundred twenty billion, one hundred ten million, two hundred eleven thousand, nine hundred eighty-one".