2012200421221 has 2 divisors, whose sum is σ = 2012200421222. Its totient is φ = 2012200421220.

The previous prime is 2012200421201. The next prime is 2012200421243. The reversal of 2012200421221 is 1221240022102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1306709616996 + 705490804225 = 1143114^2 + 839935^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012200421221 - 2⁹ = 2012200420709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012200421201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006100210610 + 1006100210611.

It is an arithmetic number, because the mean of its divisors is an integer number (1006100210611).

Almost surely, 2^{2012200421221} is an apocalyptic number.

It is an amenable number.

2012200421221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012200421221 is an equidigital number, since it uses as much as digits as its factorization.

2012200421221 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.

Adding to 2012200421221 its reverse (1221240022102), we get a palindrome (3233440443323).

The spelling of 2012200421221 in words is "two trillion, twelve billion, two hundred million, four hundred twenty-one thousand, two hundred twenty-one".