1123231321211 has 2 divisors, whose sum is σ = 1123231321212. Its totient is φ = 1123231321210.

The previous prime is 1123231321187. The next prime is 1123231321213. The reversal of 1123231321211 is 1121231323211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123231321211 is a prime.

Together with 1123231321213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1123231321213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561615660605 + 561615660606.

It is an arithmetic number, because the mean of its divisors is an integer number (561615660606).

Almost surely, 2^{1123231321211} is an apocalyptic number.

1123231321211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123231321211 is an equidigital number, since it uses as much as digits as its factorization.

1123231321211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1123231321211 its reverse (1121231323211), we get a palindrome (2244462644422).

The spelling of 1123231321211 in words is "one trillion, one hundred twenty-three billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred eleven".