123003130030040 has 128 divisors (see below), whose sum is σ = 298536538809600. Its totient is φ = 45341830963200.

The previous prime is 123003130030007. The next prime is 123003130030073. The reversal of 123003130030040 is 40030031300321.

It is an interprime number because it is at equal distance from previous prime (123003130030007) and next prime (123003130030073).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123003130029994 and 123003130030021.

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, 1545206240 + ... + 1545285840.

It is an arithmetic number, because the mean of its divisors is an integer number (2332316709450).

Almost surely, 2^{123003130030040} is an apocalyptic number.

123003130030040 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 123003130030040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149268269404800).

123003130030040 is an abundant number, since it is smaller than the sum of its proper divisors (175533408779560).

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

123003130030040 is a wasteful number, since it uses less digits than its factorization.

123003130030040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84477 (or 84473 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 123003130030040 its reverse (40030031300321), we get a palindrome (163033161330361).

The spelling of 123003130030040 in words is "one hundred twenty-three trillion, three billion, one hundred thirty million, thirty thousand, forty".