2311211123321 has 2 divisors, whose sum is σ = 2311211123322. Its totient is φ = 2311211123320.

The previous prime is 2311211123317. The next prime is 2311211123387. The reversal of 2311211123321 is 1233211121132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2116210278400 + 195000844921 = 1454720^2 + 441589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311211123321 - 2² = 2311211123317 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311211123521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155605561660 + 1155605561661.

It is an arithmetic number, because the mean of its divisors is an integer number (1155605561661).

Almost surely, 2^{2311211123321} is an apocalyptic number.

It is an amenable number.

2311211123321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311211123321 is an equidigital number, since it uses as much as digits as its factorization.

2311211123321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

Adding to 2311211123321 its reverse (1233211121132), we get a palindrome (3544422244453).

The spelling of 2311211123321 in words is "two trillion, three hundred eleven billion, two hundred eleven million, one hundred twenty-three thousand, three hundred twenty-one".