11211131329231 has 2 divisors, whose sum is σ = 11211131329232. Its totient is φ = 11211131329230.

The previous prime is 11211131329213. The next prime is 11211131329259. The reversal of 11211131329231 is 13292313111211.

Together with previous prime (11211131329213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11211131329231 - 2²⁹ = 11210594458319 is a prime.

It is a super-2 number, since 2×11211131329231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11211131329193 and 11211131329202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211131329201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605565664615 + 5605565664616.

It is an arithmetic number, because the mean of its divisors is an integer number (5605565664616).

Almost surely, 2^{11211131329231} is an apocalyptic number.

11211131329231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211131329231 is an equidigital number, since it uses as much as digits as its factorization.

11211131329231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 31.

The spelling of 11211131329231 in words is "eleven trillion, two hundred eleven billion, one hundred thirty-one million, three hundred twenty-nine thousand, two hundred thirty-one".