123130021032 has 96 divisors (see below), whose sum is σ = 339990323400. Its totient is φ = 40242728448.

The previous prime is 123130020977. The next prime is 123130021039. The reversal of 123130021032 is 230120031321.

123130021032 is a `hidden beast` number, since 123 + 1 + 300 + 210 + 32 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 123120984996 + 9036036 = 350886^2 + 3006^2 .

It is a super-2 number, since 2×123130021032² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123130020996 and 123130021014.

It is not an unprimeable number, because it can be changed into a prime (123130021039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6359238 + ... + 6378570.

Almost surely, 2^123130021032 is an apocalyptic number.

123130021032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123130021032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169995161700).

123130021032 is an abundant number, since it is smaller than the sum of its proper divisors (216860302368).

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

123130021032 is a wasteful number, since it uses less digits than its factorization.

123130021032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21067 (or 21060 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 123130021032 its reverse (230120031321), we get a palindrome (353250052353).

The spelling of 123130021032 in words is "one hundred twenty-three billion, one hundred thirty million, twenty-one thousand, thirty-two".