1121212211311 has 2 divisors, whose sum is σ = 1121212211312. Its totient is φ = 1121212211310.

The previous prime is 1121212211309. The next prime is 1121212211351. The reversal of 1121212211311 is 1131122121211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121212211311 - 2¹ = 1121212211309 is a prime.

Together with 1121212211309, 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 (1121212211351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560606105655 + 560606105656.

It is an arithmetic number, because the mean of its divisors is an integer number (560606105656).

Almost surely, 2^{1121212211311} is an apocalyptic number.

1121212211311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121212211311 is an equidigital number, since it uses as much as digits as its factorization.

1121212211311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 19.

Adding to 1121212211311 its reverse (1131122121211), we get a palindrome (2252334332522).

The spelling of 1121212211311 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, three hundred eleven".