123012220 has 24 divisors (see below), whose sum is σ = 260190000. Its totient is φ = 48849792.

The previous prime is 123012203. The next prime is 123012223. The reversal of 123012220 is 22210321.

It is a self number, because there is not a number n which added to its sum of digits gives 123012220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19345 + ... + 24904.

It is an arithmetic number, because the mean of its divisors is an integer number (10841250).

Almost surely, 2^123012220 is an apocalyptic number.

123012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123012220 is an abundant number, since it is smaller than the sum of its proper divisors (137177780).

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

123012220 is a wasteful number, since it uses less digits than its factorization.

123012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44397 (or 44395 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 123012220 is about 11091.0874128735. The cubic root of 123012220 is about 497.3354522611.

Adding to 123012220 its reverse (22210321), we get a palindrome (145222541).

The spelling of 123012220 in words is "one hundred twenty-three million, twelve thousand, two hundred twenty".