123431141020165 has 16 divisors (see below), whose sum is σ = 161584191282240. Its totient is φ = 89767209963520.

The previous prime is 123431141020153. The next prime is 123431141020267. The reversal of 123431141020165 is 561020141134321.

It is not a de Polignac number, because 123431141020165 - 2¹³ = 123431141011973 is a prime.

It is a super-4 number, since 4×123431141020165⁴ (a number of 57 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123431141020165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5550460 + ... + 16663429.

It is an arithmetic number, because the mean of its divisors is an integer number (10099011955140).

Almost surely, 2^{123431141020165} is an apocalyptic number.

It is an amenable number.

123431141020165 is a deficient number, since it is larger than the sum of its proper divisors (38153050262075).

123431141020165 is a wasteful number, since it uses less digits than its factorization.

123431141020165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22314932.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 123431141020165 its reverse (561020141134321), we get a palindrome (684451282154486).

The spelling of 123431141020165 in words is "one hundred twenty-three trillion, four hundred thirty-one billion, one hundred forty-one million, twenty thousand, one hundred sixty-five".