123111334401 has 32 divisors (see below), whose sum is σ = 181944499200. Its totient is φ = 73418114880.

The previous prime is 123111334391. The next prime is 123111334421. The reversal of 123111334401 is 104433111321.

It is a happy number.

It is not a de Polignac number, because 123111334401 - 2¹⁰ = 123111333377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123111334421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2001615 + ... + 2062203.

It is an arithmetic number, because the mean of its divisors is an integer number (5685765600).

Almost surely, 2^123111334401 is an apocalyptic number.

123111334401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123111334401 is a deficient number, since it is larger than the sum of its proper divisors (58833164799).

123111334401 is a wasteful number, since it uses less digits than its factorization.

123111334401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61589.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 123111334401 its reverse (104433111321), we get a palindrome (227544445722).

The spelling of 123111334401 in words is "one hundred twenty-three billion, one hundred eleven million, three hundred thirty-four thousand, four hundred one".