2011121201 has 2 divisors, whose sum is σ = 2011121202. Its totient is φ = 2011121200.

The previous prime is 2011121179. The next prime is 2011121269. The reversal of 2011121201 is 1021211102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1134072976 + 877048225 = 33676^2 + 29615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011121201 is a prime.

It is a super-2 number, since 2×2011121201² = 8089216970223364802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2011121401) 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, 1005560600 + 1005560601.

It is an arithmetic number, because the mean of its divisors is an integer number (1005560601).

Almost surely, 2^2011121201 is an apocalyptic number.

It is an amenable number.

2011121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011121201 is an equidigital number, since it uses as much as digits as its factorization.

2011121201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2011121201 is about 44845.5259864348. The cubic root of 2011121201 is about 1262.2520405231.

Adding to 2011121201 its reverse (1021211102), we get a palindrome (3032332303).

The spelling of 2011121201 in words is "two billion, eleven million, one hundred twenty-one thousand, two hundred one".