11121311131211 has 2 divisors, whose sum is σ = 11121311131212. Its totient is φ = 11121311131210.

The previous prime is 11121311131121. The next prime is 11121311131247. The reversal of 11121311131211 is 11213111312111.

Together with previous prime (11121311131121) it forms an Ormiston pair, because they use the same digits, order apart.

It is a m-pointer prime, because the next prime (11121311131247) can be obtained adding 11121311131211 to its product of digits (36).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121311131211 is a prime.

It is a super-2 number, since 2×11121311131211² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11121311131111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560655565605 + 5560655565606.

It is an arithmetic number, because the mean of its divisors is an integer number (5560655565606).

Almost surely, 2^{11121311131211} is an apocalyptic number.

11121311131211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121311131211 is an equidigital number, since it uses as much as digits as its factorization.

11121311131211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 20.

Adding to 11121311131211 its reverse (11213111312111), we get a palindrome (22334422443322).

The spelling of 11121311131211 in words is "eleven trillion, one hundred twenty-one billion, three hundred eleven million, one hundred thirty-one thousand, two hundred eleven".