123544441031221 has 16 divisors (see below), whose sum is σ = 143301616533504. Its totient is φ = 104314271214384.

The previous prime is 123544441031149. The next prime is 123544441031299. The reversal of 123544441031221 is 122130144445321.

It is not a de Polignac number, because 123544441031221 - 2⁹ = 123544441030709 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 (123544441031621) 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 15 ways as a sum of consecutive naturals, for example, 162336636 + ... + 163095898.

It is an arithmetic number, because the mean of its divisors is an integer number (8956351033344).

Almost surely, 2^{123544441031221} is an apocalyptic number.

It is an amenable number.

123544441031221 is a deficient number, since it is larger than the sum of its proper divisors (19757175502283).

123544441031221 is an equidigital number, since it uses as much as digits as its factorization.

123544441031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106280.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 123544441031221 its reverse (122130144445321), we get a palindrome (245674585476542).

The spelling of 123544441031221 in words is "one hundred twenty-three trillion, five hundred forty-four billion, four hundred forty-one million, thirty-one thousand, two hundred twenty-one".