123021111120 has 320 divisors, whose sum is σ = 404569105920. Its totient is φ = 30875213824.

The previous prime is 123021111113. The next prime is 123021111121. The reversal of 123021111120 is 21111120321.

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 123021111120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021111121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61601962 + ... + 61603958.

It is an arithmetic number, because the mean of its divisors is an integer number (1264278456).

Almost surely, 2^123021111120 is an apocalyptic number.

123021111120 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 123021111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202284552960).

123021111120 is an abundant number, since it is smaller than the sum of its proper divisors (281547994800).

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

123021111120 is a wasteful number, since it uses less digits than its factorization.

123021111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262 (or 2256 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 123021111120 its reverse (21111120321), we get a palindrome (144132231441).

The spelling of 123021111120 in words is "one hundred twenty-three billion, twenty-one million, one hundred eleven thousand, one hundred twenty".