123012203124221 has 4 divisors (see below), whose sum is σ = 123012888421500. Its totient is φ = 123011517826944.

The previous prime is 123012203124203. The next prime is 123012203124227. The reversal of 123012203124221 is 122421302210321.

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 33936566760100 + 89075636364121 = 5825510^2 + 9437989^2 .

It is a cyclic number.

It is not a de Polignac number, because 123012203124221 - 2³⁰ = 123011129382397 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 (123012203124227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342379316 + ... + 342738413.

It is an arithmetic number, because the mean of its divisors is an integer number (30753222105375).

Almost surely, 2^{123012203124221} is an apocalyptic number.

It is an amenable number.

123012203124221 is a deficient number, since it is larger than the sum of its proper divisors (685297279).

123012203124221 is an equidigital number, since it uses as much as digits as its factorization.

123012203124221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685297278.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 123012203124221 its reverse (122421302210321), we get a palindrome (245433505334542).

The spelling of 123012203124221 in words is "one hundred twenty-three trillion, twelve billion, two hundred three million, one hundred twenty-four thousand, two hundred twenty-one".