2012211181 has 2 divisors, whose sum is σ = 2012211182. Its totient is φ = 2012211180.

The previous prime is 2012211151. The next prime is 2012211203. The reversal of 2012211181 is 1811122102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1378933956 + 633277225 = 37134^2 + 25165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012211181 - 2⁷ = 2012211053 is a prime.

It is a super-2 number, since 2×2012211181² = 8097987673882829522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012211151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006105590 + 1006105591.

It is an arithmetic number, because the mean of its divisors is an integer number (1006105591).

Almost surely, 2^2012211181 is an apocalyptic number.

It is an amenable number.

2012211181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012211181 is an equidigital number, since it uses as much as digits as its factorization.

2012211181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 2012211181 is about 44857.6769460925. The cubic root of 2012211181 is about 1262.4800362298.

Adding to 2012211181 its reverse (1811122102), we get a palindrome (3823333283).

The spelling of 2012211181 in words is "two billion, twelve million, two hundred eleven thousand, one hundred eighty-one".