1111121211311 has 2 divisors, whose sum is σ = 1111121211312. Its totient is φ = 1111121211310.

The previous prime is 1111121211271. The next prime is 1111121211323. The reversal of 1111121211311 is 1131121211111.

It is a m-pointer prime, because the next prime (1111121211323) can be obtained adding 1111121211311 to its product of digits (12).

It is a strong prime.

It is an emirp because it is prime and its reverse (1131121211111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111121211311 - 2⁶ = 1111121211247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111121211311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111121214311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555560605655 + 555560605656.

It is an arithmetic number, because the mean of its divisors is an integer number (555560605656).

Almost surely, 2^{1111121211311} is an apocalyptic number.

1111121211311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111121211311 is an equidigital number, since it uses as much as digits as its factorization.

1111121211311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12, while the sum is 17.

Adding to 1111121211311 its reverse (1131121211111), we get a palindrome (2242242422422).

The spelling of 1111121211311 in words is "one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, three hundred eleven".