123545520213125 has 40 divisors (see below), whose sum is σ = 154516383229824. Its totient is φ = 98750723720000.

The previous prime is 123545520213119. The next prime is 123545520213131. The reversal of 123545520213125 is 521312025545321.

It is an interprime number because it is at equal distance from previous prime (123545520213119) and next prime (123545520213131).

It is not a de Polignac number, because 123545520213125 - 2³⁶ = 123476800736389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4892297999 + ... + 4892323251.

Almost surely, 2^{123545520213125} is an apocalyptic number.

It is an amenable number.

123545520213125 is a deficient number, since it is larger than the sum of its proper divisors (30970863016699).

123545520213125 is an equidigital number, since it uses as much as digits as its factorization.

123545520213125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31751 (or 31736 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 123545520213125 its reverse (521312025545321), we get a palindrome (644857545758446).

The spelling of 123545520213125 in words is "one hundred twenty-three trillion, five hundred forty-five billion, five hundred twenty million, two hundred thirteen thousand, one hundred twenty-five".