2011000222181 has 2 divisors, whose sum is σ = 2011000222182. Its totient is φ = 2011000222180.

The previous prime is 2011000222139. The next prime is 2011000222229. The reversal of 2011000222181 is 1812220001102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1996936396900 + 14063825281 = 1413130^2 + 118591^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011000222181 - 2²² = 2010996027877 is a prime.

It is a super-2 number, since 2×2011000222181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011000222081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005500111090 + 1005500111091.

It is an arithmetic number, because the mean of its divisors is an integer number (1005500111091).

Almost surely, 2^{2011000222181} is an apocalyptic number.

It is an amenable number.

2011000222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011000222181 is an equidigital number, since it uses as much as digits as its factorization.

2011000222181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 2011000222181 its reverse (1812220001102), we get a palindrome (3823220223283).

The spelling of 2011000222181 in words is "two trillion, eleven billion, two hundred twenty-two thousand, one hundred eighty-one".