1221212010241 has 2 divisors, whose sum is σ = 1221212010242. Its totient is φ = 1221212010240.

The previous prime is 1221212010191. The next prime is 1221212010247. The reversal of 1221212010241 is 1420102121221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1154182800241 + 67029210000 = 1074329^2 + 258900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221212010241 - 2⁹ = 1221212009729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221212010247) 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, 610606005120 + 610606005121.

It is an arithmetic number, because the mean of its divisors is an integer number (610606005121).

Almost surely, 2^{1221212010241} is an apocalyptic number.

It is an amenable number.

1221212010241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221212010241 is an equidigital number, since it uses as much as digits as its factorization.

1221212010241 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 19.

Adding to 1221212010241 its reverse (1420102121221), we get a palindrome (2641314131462).

The spelling of 1221212010241 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, ten thousand, two hundred forty-one".