123411131111 has 2 divisors, whose sum is σ = 123411131112. Its totient is φ = 123411131110.

The previous prime is 123411131033. The next prime is 123411131153. The reversal of 123411131111 is 111131114321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123411131111 - 2¹⁴ = 123411114727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123411131171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61705565555 + 61705565556.

It is an arithmetic number, because the mean of its divisors is an integer number (61705565556).

Almost surely, 2^123411131111 is an apocalyptic number.

123411131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

123411131111 is an equidigital number, since it uses as much as digits as its factorization.

123411131111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 20.

Adding to 123411131111 its reverse (111131114321), we get a palindrome (234542245432).

The spelling of 123411131111 in words is "one hundred twenty-three billion, four hundred eleven million, one hundred thirty-one thousand, one hundred eleven".