123015323112 has 64 divisors (see below), whose sum is σ = 335754754560. Its totient is φ = 37248657600.

The previous prime is 123015323111. The next prime is 123015323113. The reversal of 123015323112 is 211323510321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123015323111) and next prime (123015323113).

It is a super-2 number, since 2×123015323112² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (123015323111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165187 + ... + 522797.

It is an arithmetic number, because the mean of its divisors is an integer number (5246168040).

Almost surely, 2^123015323112 is an apocalyptic number.

123015323112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123015323112 is an abundant number, since it is smaller than the sum of its proper divisors (212739431448).

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

123015323112 is a wasteful number, since it uses less digits than its factorization.

123015323112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358934 (or 358930 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 123015323112 its reverse (211323510321), we get a palindrome (334338833433).

The spelling of 123015323112 in words is "one hundred twenty-three billion, fifteen million, three hundred twenty-three thousand, one hundred twelve".