210200981 has 2 divisors, whose sum is σ = 210200982. Its totient is φ = 210200980.

The previous prime is 210200957. The next prime is 210200983. The reversal of 210200981 is 189002012.

210200981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203518756 + 6682225 = 14266^2 + 2585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210200981 is a prime.

It is a super-2 number, since 2×210200981² = 88368904826724722, which contains 22 as substring.

Together with 210200983, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_11612066 and since 210200981 and 11612066 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210200983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100490 + 105100491.

It is an arithmetic number, because the mean of its divisors is an integer number (105100491).

Almost surely, 2^210200981 is an apocalyptic number.

It is an amenable number.

210200981 is a deficient number, since it is larger than the sum of its proper divisors (1).

210200981 is an equidigital number, since it uses as much as digits as its factorization.

210200981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 210200981 is about 14498.3095911213. The cubic root of 210200981 is about 594.5817563045.

Adding to 210200981 its reverse (189002012), we get a palindrome (399202993).

The spelling of 210200981 in words is "two hundred ten million, two hundred thousand, nine hundred eighty-one".