123111803 has 2 divisors, whose sum is σ = 123111804. Its totient is φ = 123111802.

The previous prime is 123111787. The next prime is 123111823. The reversal of 123111803 is 308111321.

It is an a-pointer prime, because the next prime (123111823) can be obtained adding 123111803 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123111803 - 2⁴ = 123111787 is a prime.

It is not a weakly prime, because it can be changed into another prime (123111823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555901 + 61555902.

It is an arithmetic number, because the mean of its divisors is an integer number (61555902).

Almost surely, 2^123111803 is an apocalyptic number.

123111803 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111803 is an equidigital number, since it uses as much as digits as its factorization.

123111803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 123111803 is about 11095.5758300324. The cubic root of 123111803 is about 497.4696199558.

The spelling of 123111803 in words is "one hundred twenty-three million, one hundred eleven thousand, eight hundred three".