2011010121209 has 2 divisors, whose sum is σ = 2011010121210. Its totient is φ = 2011010121208.

The previous prime is 2011010121089. The next prime is 2011010121271. The reversal of 2011010121209 is 9021210101102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1489444503184 + 521565618025 = 1220428^2 + 722195^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011010121209 - 2¹⁶ = 2011010055673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011010120209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005505060604 + 1005505060605.

It is an arithmetic number, because the mean of its divisors is an integer number (1005505060605).

Almost surely, 2^{2011010121209} is an apocalyptic number.

It is an amenable number.

2011010121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011010121209 is an equidigital number, since it uses as much as digits as its factorization.

2011010121209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 2011010121209 in words is "two trillion, eleven billion, ten million, one hundred twenty-one thousand, two hundred nine".