144215144221 has 4 divisors (see below), whose sum is σ = 146936184732. Its totient is φ = 141494103712.

The previous prime is 144215144219. The next prime is 144215144239. The reversal of 144215144221 is 122441512441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122441512441 = 70051 ⋅1747891.

It can be written as a sum of positive squares in 2 ways, for example, as 123911744121 + 20303400100 = 352011^2 + 142490^2 .

It is a cyclic number.

It is not a de Polignac number, because 144215144221 - 2¹ = 144215144219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144215144251) 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, 1360520176 + ... + 1360520281.

It is an arithmetic number, because the mean of its divisors is an integer number (36734046183).

Almost surely, 2^144215144221 is an apocalyptic number.

It is an amenable number.

144215144221 is a deficient number, since it is larger than the sum of its proper divisors (2721040511).

144215144221 is an equidigital number, since it uses as much as digits as its factorization.

144215144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721040510.

The product of its digits is 10240, while the sum is 31.

Adding to 144215144221 its reverse (122441512441), we get a palindrome (266656656662).

The spelling of 144215144221 in words is "one hundred forty-four billion, two hundred fifteen million, one hundred forty-four thousand, two hundred twenty-one".