123230012220 has 72 divisors (see below), whose sum is σ = 427197380064. Its totient is φ = 28166859648.

The previous prime is 123230012219. The next prime is 123230012273. The reversal of 123230012220 is 22210032321.

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 = 123230012193 and 123230012202.

It is a congruent number.

It is an unprimeable number.

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, 48899539 + ... + 48902058.

Almost surely, 2^123230012220 is an apocalyptic number.

123230012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123230012220 is an abundant number, since it is smaller than the sum of its proper divisors (303967367844).

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

123230012220 is a wasteful number, since it uses less digits than its factorization.

123230012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97801619 (or 97801614 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 123230012220 its reverse (22210032321), we get a palindrome (145440044541).

The spelling of 123230012220 in words is "one hundred twenty-three billion, two hundred thirty million, twelve thousand, two hundred twenty".