101011211209 has 2 divisors, whose sum is σ = 101011211210. Its totient is φ = 101011211208.

The previous prime is 101011211183. The next prime is 101011211243. The reversal of 101011211209 is 902112110101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62662605625 + 38348605584 = 250325^2 + 195828^2 .

It is a cyclic number.

It is not a de Polignac number, because 101011211209 - 2²¹ = 101009114057 is a prime.

It is not a weakly prime, because it can be changed into another prime (101011212209) 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, 50505605604 + 50505605605.

It is an arithmetic number, because the mean of its divisors is an integer number (50505605605).

Almost surely, 2^101011211209 is an apocalyptic number.

It is an amenable number.

101011211209 is a deficient number, since it is larger than the sum of its proper divisors (1).

101011211209 is an equidigital number, since it uses as much as digits as its factorization.

101011211209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 101011211209 in words is "one hundred one billion, eleven million, two hundred eleven thousand, two hundred nine".