123545530311021 has 48 divisors (see below), whose sum is σ = 231196314061440. Its totient is φ = 61737037695360.

The previous prime is 123545530310947. The next prime is 123545530311037. The reversal of 123545530311021 is 120113035545321.

It is a happy number.

123545530311021 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 4 + 5 + 530 + 3 + 110 + 2 + 1 = 666.

It is not a de Polignac number, because 123545530311021 - 2²³ = 123545521922413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123545530311041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3969701370 + ... + 3969732491.

It is an arithmetic number, because the mean of its divisors is an integer number (4816589876280).

Almost surely, 2^{123545530311021} is an apocalyptic number.

It is an amenable number.

123545530311021 is a deficient number, since it is larger than the sum of its proper divisors (107650783750419).

123545530311021 is a wasteful number, since it uses less digits than its factorization.

123545530311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7939433906 (or 7939433903 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 123545530311021 its reverse (120113035545321), we get a palindrome (243658565856342).

The spelling of 123545530311021 in words is "one hundred twenty-three trillion, five hundred forty-five billion, five hundred thirty million, three hundred eleven thousand, twenty-one".