123105215544215 has 8 divisors (see below), whose sum is σ = 147748245039360. Its totient is φ = 98469514844512.

The previous prime is 123105215544209. The next prime is 123105215544221. The reversal of 123105215544215 is 512445512501321.

It is an interprime number because it is at equal distance from previous prime (123105215544209) and next prime (123105215544221).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123105215544215 - 2¹² = 123105215540119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1832161904 + ... + 1832229093.

It is an arithmetic number, because the mean of its divisors is an integer number (18468530629920).

Almost surely, 2^{123105215544215} is an apocalyptic number.

123105215544215 is a deficient number, since it is larger than the sum of its proper divisors (24643029495145).

123105215544215 is an equidigital number, since it uses as much as digits as its factorization.

123105215544215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664397721.

The product of its (nonzero) digits is 240000, while the sum is 41.

The spelling of 123105215544215 in words is "one hundred twenty-three trillion, one hundred five billion, two hundred fifteen million, five hundred forty-four thousand, two hundred fifteen".