2311211033231 has 2 divisors, whose sum is σ = 2311211033232. Its totient is φ = 2311211033230.

The previous prime is 2311211033227. The next prime is 2311211033239. The reversal of 2311211033231 is 1323301121132.

2311211033231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2311211033231 - 2² = 2311211033227 is a prime.

It is a super-2 number, since 2×2311211033231² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2311211033197 and 2311211033206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311211033239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155605516615 + 1155605516616.

It is an arithmetic number, because the mean of its divisors is an integer number (1155605516616).

Almost surely, 2^{2311211033231} is an apocalyptic number.

2311211033231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311211033231 is an equidigital number, since it uses as much as digits as its factorization.

2311211033231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2311211033231 its reverse (1323301121132), we get a palindrome (3634512154363).

The spelling of 2311211033231 in words is "two trillion, three hundred eleven billion, two hundred eleven million, thirty-three thousand, two hundred thirty-one".