210010129981 has 2 divisors, whose sum is σ = 210010129982. Its totient is φ = 210010129980.

The previous prime is 210010129957. The next prime is 210010130089. The reversal of 210010129981 is 189921010012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126191194756 + 83818935225 = 355234^2 + 289515^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010129981 - 2⁵ = 210010129949 is a prime.

It is a super-2 number, since 2×210010129981² (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 (210010159981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005064990 + 105005064991.

It is an arithmetic number, because the mean of its divisors is an integer number (105005064991).

Almost surely, 2^210010129981 is an apocalyptic number.

It is an amenable number.

210010129981 is a deficient number, since it is larger than the sum of its proper divisors (1).

210010129981 is an equidigital number, since it uses as much as digits as its factorization.

210010129981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 34.

Adding to 210010129981 its reverse (189921010012), we get a palindrome (399931139993).

The spelling of 210010129981 in words is "two hundred ten billion, ten million, one hundred twenty-nine thousand, nine hundred eighty-one".