2011422181 has 2 divisors, whose sum is σ = 2011422182. Its totient is φ = 2011422180.

The previous prime is 2011422173. The next prime is 2011422191. The reversal of 2011422181 is 1812241102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1992193956 + 19228225 = 44634^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011422181 - 2³ = 2011422173 is a prime.

It is a super-2 number, since 2×2011422181² = 8091638380437593522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011422191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005711090 + 1005711091.

It is an arithmetic number, because the mean of its divisors is an integer number (1005711091).

Almost surely, 2^2011422181 is an apocalyptic number.

It is an amenable number.

2011422181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011422181 is an equidigital number, since it uses as much as digits as its factorization.

2011422181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 2011422181 is about 44848.8816025550. The cubic root of 2011422181 is about 1262.3150060086.

Adding to 2011422181 its reverse (1812241102), we get a palindrome (3823663283).

The spelling of 2011422181 in words is "two billion, eleven million, four hundred twenty-two thousand, one hundred eighty-one".