2012144221 has 2 divisors, whose sum is σ = 2012144222. Its totient is φ = 2012144220.

The previous prime is 2012144177. The next prime is 2012144227. The reversal of 2012144221 is 1224412102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1510876900 + 501267321 = 38870^2 + 22389^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012144221 - 2⁹ = 2012143709 is a prime.

It is a super-2 number, since 2×2012144221² = 8097448732207393682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012144227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006072110 + 1006072111.

It is an arithmetic number, because the mean of its divisors is an integer number (1006072111).

Almost surely, 2^2012144221 is an apocalyptic number.

It is an amenable number.

2012144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012144221 is an equidigital number, since it uses as much as digits as its factorization.

2012144221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2012144221 is about 44856.9305793430. The cubic root of 2012144221 is about 1262.4660322985.

Adding to 2012144221 its reverse (1224412102), we get a palindrome (3236556323).

The spelling of 2012144221 in words is "two billion, twelve million, one hundred forty-four thousand, two hundred twenty-one".