1211011011241 has 2 divisors, whose sum is σ = 1211011011242. Its totient is φ = 1211011011240.

The previous prime is 1211011011151. The next prime is 1211011011289. The reversal of 1211011011241 is 1421101101121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1037097824400 + 173913186841 = 1018380^2 + 417029^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211011011241 - 2¹³ = 1211011003049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211011011541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605505505620 + 605505505621.

It is an arithmetic number, because the mean of its divisors is an integer number (605505505621).

Almost surely, 2^{1211011011241} is an apocalyptic number.

It is an amenable number.

1211011011241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211011011241 is an equidigital number, since it uses as much as digits as its factorization.

1211011011241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1211011011241 its reverse (1421101101121), we get a palindrome (2632112112362).

The spelling of 1211011011241 in words is "one trillion, two hundred eleven billion, eleven million, eleven thousand, two hundred forty-one".