1211144204911 has 2 divisors, whose sum is σ = 1211144204912. Its totient is φ = 1211144204910.

The previous prime is 1211144204909. The next prime is 1211144204923. The reversal of 1211144204911 is 1194024411121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211144204911 - 2¹ = 1211144204909 is a prime.

Together with 1211144204909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211144204951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605572102455 + 605572102456.

It is an arithmetic number, because the mean of its divisors is an integer number (605572102456).

Almost surely, 2^{1211144204911} is an apocalyptic number.

1211144204911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211144204911 is an equidigital number, since it uses as much as digits as its factorization.

1211144204911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 1211144204911 in words is "one trillion, two hundred eleven billion, one hundred forty-four million, two hundred four thousand, nine hundred eleven".