2111121311311 has 2 divisors, whose sum is σ = 2111121311312. Its totient is φ = 2111121311310.

The previous prime is 2111121311303. The next prime is 2111121311339. The reversal of 2111121311311 is 1131131211112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111121311311 - 2³ = 2111121311303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111121311011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055560655655 + 1055560655656.

It is an arithmetic number, because the mean of its divisors is an integer number (1055560655656).

Almost surely, 2^{2111121311311} is an apocalyptic number.

2111121311311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111121311311 is an equidigital number, since it uses as much as digits as its factorization.

2111121311311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 19.

Adding to 2111121311311 its reverse (1131131211112), we get a palindrome (3242252522423).

The spelling of 2111121311311 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, three hundred eleven thousand, three hundred eleven".