123112012240 has 160 divisors (see below), whose sum is σ = 333218744064. Its totient is φ = 41428316160.

The previous prime is 123112012211. The next prime is 123112012273. The reversal of 123112012240 is 42210211321.

It is a congruent number.

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, 10537282 + ... + 10548958.

Almost surely, 2^123112012240 is an apocalyptic number.

123112012240 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 123112012240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166609372032).

123112012240 is an abundant number, since it is smaller than the sum of its proper divisors (210106731824).

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

123112012240 is a wasteful number, since it uses less digits than its factorization.

123112012240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12045 (or 12039 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 123112012240 its reverse (42210211321), we get a palindrome (165322223561).

The spelling of 123112012240 in words is "one hundred twenty-three billion, one hundred twelve million, twelve thousand, two hundred forty".