123130020004 has 6 divisors (see below), whose sum is σ = 215477535014. Its totient is φ = 61565010000.

The previous prime is 123130019989. The next prime is 123130020007. The reversal of 123130020004 is 400020031321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 121907119104 + 1222900900 = 349152^2 + 34970^2 .

It is a super-3 number, since 3×123130020004³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 123130020004.

It is not an unprimeable number, because it can be changed into a prime (123130020007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15391252497 + ... + 15391252504.

Almost surely, 2^123130020004 is an apocalyptic number.

It is an amenable number.

123130020004 is a deficient number, since it is larger than the sum of its proper divisors (92347515010).

123130020004 is a wasteful number, since it uses less digits than its factorization.

123130020004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30782505005 (or 30782505003 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 123130020004 its reverse (400020031321), we get a palindrome (523150051325).

The spelling of 123130020004 in words is "one hundred twenty-three billion, one hundred thirty million, twenty thousand, four".