123040013511 has 16 divisors (see below), whose sum is σ = 164369461248. Its totient is φ = 81868776000.

The previous prime is 123040013489. The next prime is 123040013519. The reversal of 123040013511 is 115310040321.

It is not a de Polignac number, because 123040013511 - 2⁵ = 123040013479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040013519) 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 15 ways as a sum of consecutive naturals, for example, 3334515 + ... + 3371211.

It is an arithmetic number, because the mean of its divisors is an integer number (10273091328).

Almost surely, 2^123040013511 is an apocalyptic number.

123040013511 is a deficient number, since it is larger than the sum of its proper divisors (41329447737).

123040013511 is a wasteful number, since it uses less digits than its factorization.

123040013511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38822.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 123040013511 its reverse (115310040321), we get a palindrome (238350053832).

The spelling of 123040013511 in words is "one hundred twenty-three billion, forty million, thirteen thousand, five hundred eleven".