123130531404 has 96 divisors (see below), whose sum is σ = 321415351040. Its totient is φ = 40762911744.

The previous prime is 123130531393. The next prime is 123130531409. The reversal of 123130531404 is 404135031321.

It is a happy number.

123130531404 is a `hidden beast` number, since 12 + 31 + 305 + 314 + 0 + 4 = 666.

It is a super-2 number, since 2×123130531404² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123130531409) 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 31 ways as a sum of consecutive naturals, for example, 13398099 + ... + 13407285.

Almost surely, 2^123130531404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123130531404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160707675520).

123130531404 is an abundant number, since it is smaller than the sum of its proper divisors (198284819636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123130531404 is a wasteful number, since it uses less digits than its factorization.

123130531404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10036 (or 10028 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 123130531404 its reverse (404135031321), we get a palindrome (527265562725).

The spelling of 123130531404 in words is "one hundred twenty-three billion, one hundred thirty million, five hundred thirty-one thousand, four hundred four".