210102011209 has 2 divisors, whose sum is σ = 210102011210. Its totient is φ = 210102011208.

The previous prime is 210102011167. The next prime is 210102011227. The reversal of 210102011209 is 902110201012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177096205584 + 33005805625 = 420828^2 + 181675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210102011209 is a prime.

It is a super-2 number, since 2×210102011209² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210102011809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051005604 + 105051005605.

It is an arithmetic number, because the mean of its divisors is an integer number (105051005605).

Almost surely, 2^210102011209 is an apocalyptic number.

It is an amenable number.

210102011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

210102011209 is an equidigital number, since it uses as much as digits as its factorization.

210102011209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 210102011209 in words is "two hundred ten billion, one hundred two million, eleven thousand, two hundred nine".