1230123120 has 40 divisors (see below), whose sum is σ = 3813382416. Its totient is φ = 328032768.

The previous prime is 1230123119. The next prime is 1230123157. The reversal of 1230123120 is 213210321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1230123120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2562517 + ... + 2562996.

Almost surely, 2^1230123120 is an apocalyptic number.

1230123120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230123120 is an abundant number, since it is smaller than the sum of its proper divisors (2583259296).

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

1230123120 is a wasteful number, since it uses less digits than its factorization.

1230123120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125529 (or 5125523 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1230123120 is about 35073.1110681673. Note that the first 3 decimals coincide. The cubic root of 1230123120 is about 1071.4770180506.

Adding to 1230123120 its reverse (213210321), we get a palindrome (1443333441).

The spelling of 1230123120 in words is "one billion, two hundred thirty million, one hundred twenty-three thousand, one hundred twenty".