123401032011 has 24 divisors (see below), whose sum is σ = 186575223744. Its totient is φ = 81498483720.

The previous prime is 123401031899. The next prime is 123401032033. The reversal of 123401032011 is 110230104321.

123401032011 is a `hidden beast` number, since 1 + 2 + 340 + 1 + 0 + 320 + 1 + 1 = 666.

It is not a de Polignac number, because 123401032011 - 2⁹ = 123401031499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123401032091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2347005 + ... + 2399006.

It is an arithmetic number, because the mean of its divisors is an integer number (7773967656).

Almost surely, 2^123401032011 is an apocalyptic number.

123401032011 is a deficient number, since it is larger than the sum of its proper divisors (63174191733).

123401032011 is an equidigital number, since it uses as much as digits as its factorization.

123401032011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746133 (or 4746121 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123401032011 its reverse (110230104321), we get a palindrome (233631136332).

The spelling of 123401032011 in words is "one hundred twenty-three billion, four hundred one million, thirty-two thousand, eleven".