123012103020 has 96 divisors (see below), whose sum is σ = 366260626368. Its totient is φ = 30741061632.

The previous prime is 123012103013. The next prime is 123012103031. The reversal of 123012103020 is 20301210321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21139 + ... + 496458.

It is an arithmetic number, because the mean of its divisors is an integer number (3815214858).

Almost surely, 2^123012103020 is an apocalyptic number.

123012103020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123012103020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183130313184).

123012103020 is an abundant number, since it is smaller than the sum of its proper divisors (243248523348).

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

123012103020 is a wasteful number, since it uses less digits than its factorization.

123012103020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517859 (or 517857 counting only the distinct ones).

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

Adding to 123012103020 its reverse (20301210321), we get a palindrome (143313313341).

The spelling of 123012103020 in words is "one hundred twenty-three billion, twelve million, one hundred three thousand, twenty".