123120020030 has 48 divisors (see below), whose sum is σ = 258016649616. Its totient is φ = 42176816640.

The previous prime is 123120020003. The next prime is 123120020053. The reversal of 123120020030 is 30020021321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 123120019987 and 123120020014.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 475790 + ... + 687470.

It is an arithmetic number, because the mean of its divisors is an integer number (5375346867).

Almost surely, 2^123120020030 is an apocalyptic number.

123120020030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123120020030 is an abundant number, since it is smaller than the sum of its proper divisors (134896629586).

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

123120020030 is a wasteful number, since it uses less digits than its factorization.

123120020030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212889 (or 212882 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 123120020030 its reverse (30020021321), we get a palindrome (153140041351).

The spelling of 123120020030 in words is "one hundred twenty-three billion, one hundred twenty million, twenty thousand, thirty".