123043103515515 has 32 divisors (see below), whose sum is σ = 199643025134592. Its totient is φ = 64698313680000.

The previous prime is 123043103515513. The next prime is 123043103515529. The reversal of 123043103515515 is 515515301340321.

It is not a de Polignac number, because 123043103515515 - 2¹ = 123043103515513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123043103515513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249156090 + ... + 249649440.

It is an arithmetic number, because the mean of its divisors is an integer number (6238844535456).

Almost surely, 2^{123043103515515} is an apocalyptic number.

123043103515515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123043103515515 is a deficient number, since it is larger than the sum of its proper divisors (76599921619077).

123043103515515 is a wasteful number, since it uses less digits than its factorization.

123043103515515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727611.

The product of its (nonzero) digits is 135000, while the sum is 39.

Adding to 123043103515515 its reverse (515515301340321), we get a palindrome (638558404855836).

The spelling of 123043103515515 in words is "one hundred twenty-three trillion, forty-three billion, one hundred three million, five hundred fifteen thousand, five hundred fifteen".