2003212181 has 2 divisors, whose sum is σ = 2003212182. Its totient is φ = 2003212180.

The previous prime is 2003212151. The next prime is 2003212223. The reversal of 2003212181 is 1812123002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218708100 + 784504081 = 34910^2 + 28009^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003212181 - 2¹⁴ = 2003195797 is a prime.

It is a super-2 number, since 2×2003212181² = 8025718084213553522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003212151) 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, 1001606090 + 1001606091.

It is an arithmetic number, because the mean of its divisors is an integer number (1001606091).

Almost surely, 2^2003212181 is an apocalyptic number.

It is an amenable number.

2003212181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003212181 is an equidigital number, since it uses as much as digits as its factorization.

2003212181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2003212181 is about 44757.2584169317. The cubic root of 2003212181 is about 1260.5952048486.

Adding to 2003212181 its reverse (1812123002), we get a palindrome (3815335183).

The spelling of 2003212181 in words is "two billion, three million, two hundred twelve thousand, one hundred eighty-one".