123030011220 has 48 divisors (see below), whose sum is σ = 356362796160. Its totient is φ = 31676692096.

The previous prime is 123030011219. The next prime is 123030011233. The reversal of 123030011220 is 22110030321.

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 123030011220.

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 15 ways as a sum of consecutive naturals, for example, 35351712 + ... + 35355191.

It is an arithmetic number, because the mean of its divisors is an integer number (7424224920).

Almost surely, 2^123030011220 is an apocalyptic number.

123030011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123030011220 is an abundant number, since it is smaller than the sum of its proper divisors (233332784940).

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

123030011220 is a wasteful number, since it uses less digits than its factorization.

123030011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70706944 (or 70706942 counting only the distinct ones).

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

Adding to 123030011220 its reverse (22110030321), we get a palindrome (145140041541).

The spelling of 123030011220 in words is "one hundred twenty-three billion, thirty million, eleven thousand, two hundred twenty".