123012020 has 24 divisors (see below), whose sum is σ = 258660864. Its totient is φ = 49140896.

The previous prime is 123011971. The next prime is 123012037. The reversal of 123012020 is 20210321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123011992 and 123012010.

It is a congruent number.

It is an unprimeable number.

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, 13697 + ... + 20823.

It is an arithmetic number, because the mean of its divisors is an integer number (10777536).

Almost surely, 2^123012020 is an apocalyptic number.

123012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123012020 is an abundant number, since it is smaller than the sum of its proper divisors (135648844).

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

123012020 is a wasteful number, since it uses less digits than its factorization.

123012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7999 (or 7997 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 123012020 is about 11091.0783966213. The cubic root of 123012020 is about 497.3351827292.

Adding to 123012020 its reverse (20210321), we get a palindrome (143222341).

The spelling of 123012020 in words is "one hundred twenty-three million, twelve thousand, twenty".