123404011 has 2 divisors, whose sum is σ = 123404012. Its totient is φ = 123404010.

The previous prime is 123403997. The next prime is 123404027. The reversal of 123404011 is 110404321.

It is an a-pointer prime, because the next prime (123404027) can be obtained adding 123404011 to its sum of digits (16).

It is a weak prime.

It is an emirp because it is prime and its reverse (110404321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123404011 - 2²³ = 115015403 is a prime.

It is not a weakly prime, because it can be changed into another prime (123402011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61702005 + 61702006.

It is an arithmetic number, because the mean of its divisors is an integer number (61702006).

Almost surely, 2^123404011 is an apocalyptic number.

123404011 is a deficient number, since it is larger than the sum of its proper divisors (1).

123404011 is an equidigital number, since it uses as much as digits as its factorization.

123404011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 123404011 is about 11108.7357966602. The cubic root of 123404011 is about 497.8628932302.

Adding to 123404011 its reverse (110404321), we get a palindrome (233808332).

The spelling of 123404011 in words is "one hundred twenty-three million, four hundred four thousand, eleven".