1210210081 has 2 divisors, whose sum is σ = 1210210082. Its totient is φ = 1210210080.

The previous prime is 1210210019. The next prime is 1210210087. The reversal of 1210210081 is 1800120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058526225 + 151683856 = 32535^2 + 12316^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210210081 - 2⁹ = 1210209569 is a prime.

It is a super-2 number, since 2×1210210081² = 2929216880308053122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1210210087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605105040 + 605105041.

It is an arithmetic number, because the mean of its divisors is an integer number (605105041).

Almost surely, 2^1210210081 is an apocalyptic number.

It is an amenable number.

1210210081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210210081 is an equidigital number, since it uses as much as digits as its factorization.

1210210081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1210210081 is about 34788.0738328525. The cubic root of 1210210081 is about 1065.6639033862.

The spelling of 1210210081 in words is "one billion, two hundred ten million, two hundred ten thousand, eighty-one".