123321311111 has 2 divisors, whose sum is σ = 123321311112. Its totient is φ = 123321311110.

The previous prime is 123321311089. The next prime is 123321311159. The reversal of 123321311111 is 111113123321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123321311111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123321311161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61660655555 + 61660655556.

It is an arithmetic number, because the mean of its divisors is an integer number (61660655556).

Almost surely, 2^123321311111 is an apocalyptic number.

123321311111 is a deficient number, since it is larger than the sum of its proper divisors (1).

123321311111 is an equidigital number, since it uses as much as digits as its factorization.

123321311111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 20.

Adding to 123321311111 its reverse (111113123321), we get a palindrome (234434434432).

The spelling of 123321311111 in words is "one hundred twenty-three billion, three hundred twenty-one million, three hundred eleven thousand, one hundred eleven".