444221215123 has 4 divisors (see below), whose sum is σ = 507681388720. Its totient is φ = 380761041528.

The previous prime is 444221215051. The next prime is 444221215157. The reversal of 444221215123 is 321512122444.

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

It is not a de Polignac number, because 444221215123 - 2¹³ = 444221206931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444221215523) 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, 31730086788 + ... + 31730086801.

It is an arithmetic number, because the mean of its divisors is an integer number (126920347180).

Almost surely, 2^444221215123 is an apocalyptic number.

444221215123 is a deficient number, since it is larger than the sum of its proper divisors (63460173597).

444221215123 is an equidigital number, since it uses as much as digits as its factorization.

444221215123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63460173596.

The product of its digits is 15360, while the sum is 31.

Adding to 444221215123 its reverse (321512122444), we get a palindrome (765733337567).

It can be divided in two parts, 444221 and 215123, that added together give a square (659344 = 812²).

The spelling of 444221215123 in words is "four hundred forty-four billion, two hundred twenty-one million, two hundred fifteen thousand, one hundred twenty-three".