12121221041 has 2 divisors, whose sum is σ = 12121221042. Its totient is φ = 12121221040.

The previous prime is 12121221011. The next prime is 12121221103. The reversal of 12121221041 is 14012212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12091201600 + 30019441 = 109960^2 + 5479^2 .

It is an emirp because it is prime and its reverse (14012212121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12121221041 - 2¹⁴ = 12121204657 is a prime.

It is a super-2 number, since 2×12121221041² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12121221011) 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, 6060610520 + 6060610521.

It is an arithmetic number, because the mean of its divisors is an integer number (6060610521).

Almost surely, 2^12121221041 is an apocalyptic number.

It is an amenable number.

12121221041 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121221041 is an equidigital number, since it uses as much as digits as its factorization.

12121221041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121221041 its reverse (14012212121), we get a palindrome (26133433162).

The spelling of 12121221041 in words is "twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, forty-one".