123105040043502 has 64 divisors (see below), whose sum is σ = 271617149664000. Its totient is φ = 36884530932480.

The previous prime is 123105040043497. The next prime is 123105040043537. The reversal of 123105040043502 is 205340040501321.

It is a super-2 number, since 2×123105040043502² (a number of 29 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 123105040043502.

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, 273203713 + ... + 273653939.

It is an arithmetic number, because the mean of its divisors is an integer number (4244017963500).

Almost surely, 2^{123105040043502} is an apocalyptic number.

123105040043502 is an abundant number, since it is smaller than the sum of its proper divisors (148512109620498).

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

123105040043502 is a wasteful number, since it uses less digits than its factorization.

123105040043502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496881.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 123105040043502 its reverse (205340040501321), we get a palindrome (328445080544823).

The spelling of 123105040043502 in words is "one hundred twenty-three trillion, one hundred five billion, forty million, forty-three thousand, five hundred two".