1211424424121 has 2 divisors, whose sum is σ = 1211424424122. Its totient is φ = 1211424424120.

The previous prime is 1211424424103. The next prime is 1211424424163. The reversal of 1211424424121 is 1214244241121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 986118511225 + 225305912896 = 993035^2 + 474664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211424424121 - 2⁶ = 1211424424057 is a prime.

It is a super-3 number, since 3×1211424424121³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1211424124121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605712212060 + 605712212061.

It is an arithmetic number, because the mean of its divisors is an integer number (605712212061).

Almost surely, 2^{1211424424121} is an apocalyptic number.

It is an amenable number.

1211424424121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211424424121 is an equidigital number, since it uses as much as digits as its factorization.

1211424424121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4096, while the sum is 29.

Adding to 1211424424121 its reverse (1214244241121), we get a palindrome (2425668665242).

The spelling of 1211424424121 in words is "one trillion, two hundred eleven billion, four hundred twenty-four million, four hundred twenty-four thousand, one hundred twenty-one".