123015050340 has 192 divisors, whose sum is σ = 424215826944. Its totient is φ = 25937252352.

The previous prime is 123015050339. The next prime is 123015050341. The reversal of 123015050340 is 43050510321.

It is an interprime number because it is at equal distance from previous prime (123015050339) and next prime (123015050341).

It is a super-2 number, since 2×123015050340² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123015050340.

It is not an unprimeable number, because it can be changed into a prime (123015050341) 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, 9040422 + ... + 9054018.

It is an arithmetic number, because the mean of its divisors is an integer number (2209457432).

Almost surely, 2^123015050340 is an apocalyptic number.

123015050340 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 123015050340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212107913472).

123015050340 is an abundant number, since it is smaller than the sum of its proper divisors (301200776604).

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

123015050340 is a wasteful number, since it uses less digits than its factorization.

123015050340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15286 (or 15284 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 123015050340 its reverse (43050510321), we get a palindrome (166065560661).

The spelling of 123015050340 in words is "one hundred twenty-three billion, fifteen million, fifty thousand, three hundred forty".