123111002111 has 2 divisors, whose sum is σ = 123111002112. Its totient is φ = 123111002110.

The previous prime is 123111002083. The next prime is 123111002117. The reversal of 123111002111 is 111200111321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123111002111 - 2¹⁸ = 123110739967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123111002117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555501055 + 61555501056.

It is an arithmetic number, because the mean of its divisors is an integer number (61555501056).

Almost surely, 2^123111002111 is an apocalyptic number.

123111002111 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111002111 is an equidigital number, since it uses as much as digits as its factorization.

123111002111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 123111002111 its reverse (111200111321), we get a palindrome (234311113432).

The spelling of 123111002111 in words is "one hundred twenty-three billion, one hundred eleven million, two thousand, one hundred eleven".