123054145544221 has 4 divisors (see below), whose sum is σ = 123174668704444. Its totient is φ = 122933622384000.

The previous prime is 123054145544167. The next prime is 123054145544293. The reversal of 123054145544221 is 122445541450321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87027908765625 + 36026236778596 = 9328875^2 + 6002186^2 .

It is a cyclic number.

It is not a de Polignac number, because 123054145544221 - 2⁹ = 123054145543709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123054145544621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60261578580 + ... + 60261580621.

It is an arithmetic number, because the mean of its divisors is an integer number (30793667176111).

Almost surely, 2^{123054145544221} is an apocalyptic number.

It is an amenable number.

123054145544221 is a deficient number, since it is larger than the sum of its proper divisors (120523160223).

123054145544221 is a wasteful number, since it uses less digits than its factorization.

123054145544221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120523160222.

The product of its (nonzero) digits is 768000, while the sum is 43.

Adding to 123054145544221 its reverse (122445541450321), we get a palindrome (245499686994542).

The spelling of 123054145544221 in words is "one hundred twenty-three trillion, fifty-four billion, one hundred forty-five million, five hundred forty-four thousand, two hundred twenty-one".