1211351242141 has 2 divisors, whose sum is σ = 1211351242142. Its totient is φ = 1211351242140.

The previous prime is 1211351242109. The next prime is 1211351242163. The reversal of 1211351242141 is 1412421531121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1116720562500 + 94630679641 = 1056750^2 + 307621^2 .

It is an emirp because it is prime and its reverse (1412421531121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211351242141 - 2⁵ = 1211351242109 is a prime.

It is a super-2 number, since 2×1211351242141² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211351252141) 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, 605675621070 + 605675621071.

It is an arithmetic number, because the mean of its divisors is an integer number (605675621071).

Almost surely, 2^{1211351242141} is an apocalyptic number.

It is an amenable number.

1211351242141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211351242141 is an equidigital number, since it uses as much as digits as its factorization.

1211351242141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

Adding to 1211351242141 its reverse (1412421531121), we get a palindrome (2623772773262).

The spelling of 1211351242141 in words is "one trillion, two hundred eleven billion, three hundred fifty-one million, two hundred forty-two thousand, one hundred forty-one".